The team announced the deal on Saturday. (h/t CSNBayArea.com)
Monell, 27, had been designated for assignment on Wednesday after he was dropped from San Francisco’s 40-man roster.
A native of the Bronx in New York, Monell was a 30th round pick by the Giants in the 2007 amateur draft who made his major league debut on Sept. 5.
In eight games and nine plate appearances, Monell was 1-for-8 and scored two runs with an RBI and three strikeouts. He did not start a game and only made one three-inning appearance behind the plate.
Monell was called up after hitting .275/.364/.494 in 121 games and 481 plate appearances for Triple-A Fresno, where he scored 71 runs and had 27 doubles, 20 homers, 64 RBI and 105 strikeouts.
The lefty swinger began to show some power in 2010, when he hit 19 homers and slugged .487 at High-A San Jose. He followed that up with 21 homers in two seasons at Double-A Richmond.