Robert Alan Cassevah
- Bats Right, Throws Right
- Height 6' 3", Weight 195 lb.
- High School Pace High School
- Debut April 9, 2010
- Final Game June 6, 2012
- Born September 11, 1985 in Jacksonville, FL USA
Cassevah began his professional career in 2005 with the AZL Angels. With them, he went 2-5 with a 5.40 ERA in 15 games (4 starts), allowing a .318 average. He pitched for the Orem Owlz in 2006, going 2-5 with a 6.80 ERA in 16 games (10 starts). Despite a .337 opponent average and almost a walk per inning (38 in 41), the Angels stuck with him.
He became a reliever in 2007 and performed well, going 2-1 with a 2.75 ERA in 24 combined relief appearances for the Orem Owlz and Cedar Rapids Kernels. In 2008, he went 2-3 with a 3.79 ERA in 44 relief appearances for the Rancho Cucamonga Quakes. He went 3-7 with a 3.68 ERA in 57 relief appearances for the Arkansas Travelers in 2009.
On December 10, 2009, the Oakland Athletics drafted him from the Angels in the 2009 Rule V Draft. He was offered back to the Angels at the end of spring training as he failed to make the Athletics' roster on the strength of two innings of work, then was called up to the major league club a few days into the season, having made only one appearance for the Salt Lake Buzz when Robb Quinlan was sent down to the minors. He made his debut on April 9, giving up only one hit in 2⅓ innings against the A's.