Brian Fuentes on bereavement list
The team announced the moves Wednesday before the start of the third game of a four-game series against the Indians.
Blevins joins the Athletics for the sixth time this season. He has a 3.80 ERA and no won-loss record in 19 outings.
Fuentes is 2-8 with a 3.96 ERA in 60 relief outings. The right-hander has 12 saves this year and has pitched well since July 4, compiling a 1.59 ERA over his past 22 appearances.
Fuentes is eligible to be reinstated Saturday when the Athletics host the Seattle Mariners in the second game of a three-game weekend set.
Copyright 2011 by The Associated Press
MORE MLB HEADLINES
- Braves suspend struggling Uggla for 1 game
- Wright to get shot to aid shoulder at break
- Reds' Simon among 4 pitchers added to ASG
- Grand record: batterymates slam for S.F.