Red Sox first baseman undergoing testing following exit vs. Pirates

Red Sox first baseman Triston Casas exited Saturday's game against the Pirates in the first inning due to what the club has termed left rib discomfort. As noted by Chris Cotillo of MassLive, manager Alex Cora indicated to reporters after the game that he was “concerned” about Casas’s injury and that the first baseman had left the ballpark to undergo further testing. While it’s not entirely clear how serious Casas’s injury is, it appears the club is at least preparing for the possibility that an IL stint will be required as Cotillo also reports that journeyman catcher Tyler Heineman is set to join the club in Pittsburgh tomorrow as the only healthy position player on the club’s 40-man roster who isn’t already on the active roster.

If Casas were to miss an extended period of time, it would be brutal news for the Red Sox. The 24-year-old slugger has gotten off to an excellent start so far this season with a .244/.337/.513 slash line with six home runs in just 89 trips to the plate. The youngster’s strong numbers early in the 2024 season are a continuation of his hot second half last year, when he slashed an incredible .317/.417/.617 in 211 trips to the plate after the All-Star break.

It’s the latest in a series of injury woes for Boston, as the club has already lost Trevor Story, Vaughn Grissom, Tyler O’Neill, and Romy Gonzalez to the injured list while Rafael Devers has missed each of the last three games after dealing with discomfort in his left knee earlier this week that eventually required him to be sent for an MRI. If even one of Devers or Casas, the Red Sox would be stretched incredibly thin in terms of infield depth, and IL stints for both of the club’s regular corner infielders would leave the club with a patchwork infield involving none of the club’s on-paper starters on the first.

Center fielder Ceddanne Rafaela has taken over at shortstop in recent days following Story’s injury, while Enmanuel Valdez has filled in for Grissom at second base to this point in the season. Bobby Dalbec has filled in for Devers at third base in recent days and has plenty of experience at first that could allow him to replace Casas as needed, leaving the likes of Pablo Reyes and David Hamilton to act as utility infielders off the bench and/or handle the hot corner in Devers’ stead if necessary.

Cotillo also notes that outfielder Rob Refsnyder took reps at first base while rehabbing earlier this season, but the 33-year-old hasn’t appeared on the infield dirt since 2018 and any appearances on the infield would further deplete an outfield mix that has already lost Rafaela to the infield and O’Neill to the injured list. With that being said, depth options such as Dalton Guthrie and Eddy Alvarez are available at the Triple-A level to be called up if necessary, though neither is currently on the 40-man roster and would therefore require a corresponding move to be made in order for Boston to select their respective contracts.