Which MLB hot and cold starts are for real?

Baltimore Orioles second baseman Jackson Holliday.

The 2024 season is just a few weeks old. There’s still a lot of time for narratives to shift and plenty of exciting or deflating changes are surely coming up over the horizon.

Nonetheless, the games in April count just as much as the games in September. Some clubs have already banked some valuable wins while others have put themselves in a real hole.

Looking at the FanGraphs playoff odds Thursday and comparing them to where they were ahead of the Seoul Series, there are five clubs that have increased their postseason chances by more than 10%. Meanwhile, six clubs have seen their odds drop by more than 10%.

Which of those are just small-sample blips and which are signs that the club’s talent level is meaningfully different than expected? Let’s take a glance.

Baltimore Orioles

The defending champions of the American League East were given just a 51.8% chance of making it back to the postseason, per the FanGraphs odds from before any games had been played. They have started out 12-6 and seen their odds jump to 76.5% Thursday, a difference of 24.7%.

Baltimore continues to get huge contributions from its young core and role players alike. Jackson Holliday’s big league career is out to a slow start, but others have picked up the slack, with Colton Cowser, Gunnar Henderson, Jordan Westburg and Cedric Mullins off and running. Even Ryan O’Hearn, who was acquired in a small cash deal from the Royals, continues to thrive.

On the pitching side, Corbin Burnes has been the expected ace while Grayson Rodriguez continues to cement himself as a quality big league arm. There are some question marks at the back end with Dean Kremer and Cole Irvin out to wobbly starts, but Kyle Bradish and John Means are both on minor league rehab assignments and could rejoin the club soon.

The 18 games they have played so far have come against the Angels, Royals, Pirates, Red Sox, Brewers and Twins.

Kansas City Royals catcher Salvador Perez (13) and Kansas City Royals shortstop Bobby Witt Jr. (7) celebrate the team’s win over the Chicago White Sox after Game 1 of a double header at Guaranteed Rate Field.

Kansas City Royals

The Royals entered the season with playoff odds of just 13.1% but they have gone 12-7 so far, bumping themselves up to 33.2%, a difference of 20.1%.

An improved rotation gets a lot of the credit. Between last year’s trade for Cole Ragans, the offseason signings of Seth Lugo and Michael Wacha, as well as the emergence of Alec Marsh, it’s a whole new look alongside Brady Singer. None of those five have an ERA higher than 4.32 so far this year.

On the position player side of things, Bobby Witt Jr. is further proving himself to be a superstar, while Salvador Perez and Vinnie Pasquantino are healthy and productive.

They have faced the Twins, Orioles, White Sox, Astros and Mets thus far.

New York Yankees shortstop Anthony Volpe (11) celebrates the win with center fielder Aaron Judge (99) against the Toronto Blue Jays at the end of the ninth inning at Rogers Centre.

New York Yankees

The Yanks had strong odds to begin with, starting out at 71.2%. A hot start of 13 wins and 6 losses has already bumped those all the way to 85.9%, a jump of 14.7%.

Health was a big factor for the Yankees last year, with players like Aaron Judge, Anthony Rizzo, DJ LeMahieu, Giancarlo Stanton, Nestor Cortes and Carlos Rodón all missing significant time. This year, Gerrit Cole is on the shelf, as is LeMahieu. But new face Juan Soto has been great so far, while Stanton, Cortes and Rodón are back in decent form.

The injuries or lack thereof will probably remain a focus for the months to come, especially with so many key players in their mid-30s. Last year, the club was 45-36 through the end of June, but mounting injuries led to them going 20-33 through July and August.

They have started their season by playing the Astros, Diamondbacks, Blue Jays, Marlins and Guardians.

Milwaukee Brewers shortstop Willy Adames (27) runs after hitting a single to break up a no-hitter in the in the seventh inning against the San Diego Padres at American Family Field.

Milwaukee Brewers

The National League Central is arguably the most up-for-grabs, with the five clubs fairly close in terms of talent. Despite being the reigning division champs, the Brewers were given just a 30.6% chance of making the postseason, below the Cardinals and Cubs. They’ve started out 11-6 and are now at 43.5%, a 12.9% bump.

There have been quite a few nice performance on the offensive side of things. Willy Adames had a bit of a down year in 2023 but is off to a good start in this campaign. Brice Turang and Blake Perkins are also putting up better numbers than last year. Joey Ortiz has done well since coming over from the Orioles in the Burnes trade.

The loss of Burnes and the injury to Brandon Woodruff left the club without their co-aces, but Freddy Peralta has stepped up with a 2.55 ERA and 39.4% strikeout rate through his first three starts.

They have faced off against the Mets, Twins, Mariners, Reds, Orioles and Padres so far.

New York Mets relief pitcher Edwin Diaz.

New York Mets

After a disastrous 2023 season and a relatively quiet winter, the Mets opened this year with their odds at 27.6%. A 10-8 start has already bumped them to 38.7%, an 11.1% difference.

They have been especially strong of late, as they started out 0-5 but have gone 10-3 over their last 13 contests. The bounceback plays on Luis Severino and Sean Manaea seem to be going well so far. Edwin Díaz is healthy again and already has four saves.

On the position player side, Brett Baty seems to be taking a step forward. DJ Stewart is carrying over last year’s hot finish, and the Tyrone Taylor pickup looks like a nice move.

They have lined up against the Brewers, Tigers, Reds, Braves, Royals and Pirates.

San Francisco Giants pitcher Blake Snell.

San Francisco Giants

The Giants added plenty of talent this winter and opened the season with playoff odds of 44.6%. But an 8-11 start has already dropped them to 34%, a difference of 10.6%.

Stretching out Jordan Hicks is going great so far, but Blake Snell showed a lot of rust in his first two starts after signing late in the offseason. On offense, acquisitions like Jung Hoo Lee, Matt Chapman and Nick Ahmed have produced subpar offense, and the same goes for incumbents like Mike Yastrzemski, Wilmer Flores and Thairo Estrada.

They have squared off against the Padres, Dodgers, Nationals, Rays and Marlins thus far.

St. Louis Cardinals right fielder Jordan Walker.

St. Louis Cardinals

Despite a dreadful 2023 campaign, expectations were high for the Cards coming into this year after they remade their rotation. But a middling start of 9-10 has dropped their playoff odds from 50.1% to 38.7%, a difference of 11.4%.

Injuries have been playing a notable role in the early going for the Cards, with Sonny Gray, Lars Nootbaar, Tommy Edman, Dylan Carlson and others missing time. The Lance Lynn signing looks good so far, as he has a 2.18 ERA through four starts, but Kyle Gibson is at 6.16.

Both the veteran Paul Goldschmidt and the youngster Jordan Walker are out to terrible starts at the plate. The Cardinals’ long list of injuries opened up playing time for guys like Alec Burleson and Victor Scott II, who have each struggled immensely.

They have faced the Dodgers, Padres, Marlins, Phillies, Diamondbacks and Athletics to this point.

Seattle Mariners center fielder Julio Rodriguez.

Seattle Mariners

The Mariners just missed the playoffs last year but still opened this season with a 60.8% chance of getting back there. A tepid start of 9-10 has seen those odds slide to 49.1%, a difference of 11.7%. Things were even more dire before they swept the Reds this week, as they were 6-10 prior to that.

The rotation has surprisingly been a problem thus far. An injury to Bryan Woo bumped Emerson Hancock into the rotation, but Hancock has an ERA of 7.98 through three starts. Each of Luis Castillo and George Kirby also have poor results, though those may be based on luck. Both have a high BABIP and low strand rate, so both have a FIP just above 3.00, about three runs lower than their ERA.

Julio Rodríguez is the biggest disappointment on the position player side. He is striking out at a 34.6% clip and walking just 5.1% of the time while still looking for his first home of the year, leading to a line of .219/.269/.260. Luke Raley, Mitch Garver and J.P. Crawford have also looked lost at the plate, with none of that trio posting a wRC+ higher than 75 so far.

The M’s have played the Red Sox, Guardians, Brewers, Blue Jays, Cubs and Reds.

Miami Marlins starting pitcher A.J. Puk.

Miami Marlins

The Fish swam into the playoffs last year, their first postseason berth in a full season in 20 years. They followed that with an offseason mostly focused on overhauling their front office and player development system. A disastrous 4-15 start has already dropped this year’s playoff odds from 27.9% to 2.3%, a difference of 25.6%.

Injuries have been a huge factor, as the club’s former starting pitching surplus quickly became a deficit. Sandy Alcántara required Tommy John surgery last year, and Eury Pérez followed him down that path this year. Edward Cabrera and Braxton Garrett also missed some time due to shoulder troubles.

A.J. Puk’s attempted move from the bullpen to the rotation is not going well so far, and Jesús Luzardo is struggling badly. Max Meyer was doing well but he was optioned to the minors to monitor his workload after he missed all of last year recovering from his own Tommy John procedure.

The offense has been pretty bad across the board, as not a single member of the team has a wRC+ of 105 or higher. Jake Burger hit the injured list earlier this week, removing one of their top power bats from that already weak group.

They faced the Pirates, Angels, Cardinals, Yankees, Braves and Giants to start the year and have yet to win back-to-back games.

Houston Astros pitcher Josh Hader.

Houston Astros

The Astros have been a powerhouse for years and opened this season with an 86.2% chance of returning to the postseason. But they have stumbled out of the gates this year with a record of 6-14, dropping their odds to 59.7%, a 26.5% drop.

Like some of the other clubs mentioned above, health has been a big factor here. Lance McCullers Jr. and Luis Garcia each underwent elbow surgery last year and are still rehabbing. So far this year, the Astros have lost Justin Verlander, José Urquidy and Framber Valdez to the IL, giving them a full rotation on the shelf. (Verlander will return Friday.)

With those prominent arms not around, others haven’t really picked up the slack. Hunter Brown has an ERA of 10.54 through four starts while J.P. France is at 7.08. Prospect Spencer Arrighetti was called up to fill in but has been tagged for nine runs over seven innings in his two outings. Josh Hader, Ryan Pressly and Bryan Abreu have surprisingly been bad out of the bullpen, with each having an ERA of 6.00 or higher.

On offense, José Abreu has been awful, hitting .078/.158/.098. That performance got him bumped down in the lineup, and he’s been ceding playing time to Jon Singleton lately.

The Astros began the year playing the Yankees, Blue Jays, Rangers, Royals and Braves.

Minnesota Twins shortstop Carlos Correa.

Minnesota Twins

The Twins are the reigning champs in the American League Central but made some budget cuts this winter. Their 6-11 start has moved their playoff odds from 66% to 38.6%, a shift of 27.4%.

Once again, injuries are a big part of the story here. Oft-injured Royce Lewis went down with a quad strain on Opening Day, and Carlos Correa followed him later, subtracting the club’s left side of the infield.

The only guys with at least 30 plate appearances and a wRC+ above 100 are Ryan Jeffers, Alex Kirilloff and the currently-injured Correa. Multiple injured relievers, most notably Jhoan Durán, have left the bullpen shorthanded.

In the rotation, the club lost Sonny Gray, Kenta Maeda and Tyler Mahle from last year’s club, but their main attempt at replacing those guys was to acquire Anthony DeSclafani on the heels of a pair of injury-wrecked seasons. He required flexor tendon surgery and will miss the rest of the year.

The incumbents haven’t been much help. Chris Paddack, Louie Varland and Bailey Ober each have an ERA above 6.50, though Ober has rebounded after being shelled for eight runs in just 1 1/3 innings in his season debut.

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