The Athletics released reliever Santiago Casilla today to make room for Rule 5 pick Bobby Cassevah, reports John Shea of the San Francisco Chronicle. Casilla would've been non-tendered on Saturday anyway.
Casilla, 29, posted a 5.96 ERA, 6.5 K/9, and 4.7 BB/9 in 48.3 relief innings this year. He was hindered by calf and knee injuries. He dealt with a sore elbow throughout the '08 season.