That's what Sabathia's left forearm injury has been classified as.
Even if Sabathia does end up missing next Monday's start, right now there's no indication that he'd have to go on the DL. April is littered with off days, so only four starters are really necessary through most of the month.
The active roster now is at 28, as four additional players were cut today:
Optioned OF Shin-Soo Choo, OF Ben Francisco, LHP Juan Lara to Buffalo (AAA)
Reassigned IF Luis Rivas to Minor League camp
This means that Tom Mastny, Mike Rouse, and Ryan Garko have made the club. Mastny is taking the place of Matt Miller. Rouse made the club based mostly on his defensive ability, although his handedness does make a nice compliment to the starting infielders. And of course Garko is expected to be the team's semi-regular first baseman, and could gain starter status if his defense improves.
Paul Hoynes notes that the Indians had some interest in Armando Benitez and Jorge Julio, and still trawling the waters for another good reliever. Chad Cordero is probably available, but it will cost whoever acquires him "multiple high-end prospects," according to Ken Rosenthal. That probably means Cordero isn't going anywhere.
The Indians received both of their Rule 5 players back today. OF Ryan Goleski, returning from Oakland, was less than pleased to be returning to Cleveland:
Not exactly the best way to endear yourself to your old organization. It looks like he'll end up in Akron again, given the already crowded outfield in Buffalo. RHP Jim Ed Warden, who was selected by the Phillies, was returned as well; he might have to go to Akron also.