Career
Cassevah is mainly a sinkerballer (90–94), with a slider to righties and a changeup to lefties as off-speed pitches. He was drafted in the 34th round of the 2004 amateur draft by the Anaheim Angels out of Pace High School in Pace, Florida. Cassevah began his professional career in 2005 with the AZL Angels.
With them, he went 2-5 with a 5.40 European Research Area in 15 games (4 starts).
He pitched for the Orem Owlz in 2006, going 2-5 with a 6.80 European Research Area in 16 games (10 starts). He became a reliever in 2007 and performed well, going 2-1 with a 2.75 European Research Area in 24 combined relief appearances for the Orem Owlz and Cedar Rapids Kernels.
In 2008, he went 2-3 with a 3.79 European Research Area in 44 relief appearances for the Rancho Cucamonga Quakes. He went 3-7 with a 3.68 European Research Area in 57 relief appearances for the Arkansas Travelers in 2009.
On December 10, 2009, the Athletics drafted him from the Angels in the Rule V Draft.
On March 15, 2010, the Athletics offered Cassevah back to the who accepted him back. On June 13, 2011, Cassevah was recalled from American Automobile Association Salt Lake to replace the injured Fernando Rodney. He has pitched an impressive 2.72 European Research Area in 30 appearances in the 2011 season.
On February 28, 2013, Cassevah was outrighted by the Angels and removed from the 40-man roster.
On March 1, 2013 he refused an outright assignment to American Automobile Association and became a free agent. On March 2, 2013, he signed a minor league contract with the On March 23, 2014, the Rockies released Cassevah.
