Giants release right-hander Mason Tobin

The San Francisco Giants released 26-year-old minor-league right-handed pitcher Mason Tobin on Thursday. The move coincided with the activation of another right-hander, Sandy Rosario, who had been on the temporarily inactive list since April 3.

Tobin, a 16th-round pick by the Los Angeles Angels out of Everett Community College in 2007, had pitched 68.1 innings with the Giants' Class-AAA affiliate Fresno Grizzlies over two seasons since being signed by San Francisco to a minor-league contract in January of 2013. 

Prior to that, Tobin pitched one major league season (just 5.1 innings) with the Texas Rangers between two Tommy John surgeries. His first operation in 2009 knocked him out for the 2010 season before posting a 6.75 ERA in those 5.1 frames with the Rangers. Then a second surgery in 2011 kept him from playing in 2012, which led to his minor-league signing with the Giants in 2013's first month.

Tobin did not have a great month of June pitching for the Grizzlies, allowing 10 runs on 16 hits and six walks over 12 innings, equating to a 7.50 ERA. He owns a career minor-league ERA of 3.39 with a WHIP of 1.287, though during his two seasons with Fresno, the 6'2" righty posted a 4.74 ERA and a 1.566 WHIP.