If Byrd doesn't perform well, he's gone. Simple as that.
During his last outing against the Chicago White Sox on Sept. 4, Byrd only lasted for two-and-a-third innings and gave up seven runs on 10 hits in a 12-2 Red Sox loss.
There's no more time to wait around like with Brad Penny and John Smoltz because now Boston is in pennant race mode and currently leading the American League Wild Card by two games over the Texas Rangers.
The Rangers remain the only threat, as Tampa Bay has gone into a complete tailspin, dropping its last seven games (thank you New York Yankees) and are now tied with the Seattle Mariners at eight and a half games out.
On the mound for Baltimore is Jason Berken, who comes in with a 4-11 record and a 6.07 ERA.
Berken had a no decision in his last outing against the Yankees, where he pitched for five-and-a-third innings and allowed one run off eight hits.
The Sox offense ignited Tuesday night for 10 runs with five home runs in the game. Hopefully they saved some of that for Byrd.