Mahay posted a 9.58 ERA with 7.0 K/9 and 6.1 BB/9 in 10 1/3 innings at Triple-A Reno this year. The emergence of Rule 5 pick Joe Paterson lessened the D'Backs' need for left-handed relief. Paterson, the lone southpaw in Arizona's 'pen, has yet to allow a run in 15 appearances and has struck out 9 batters in 7 2/3 innings. Click here for more analysis of Arizona's remade 'pen.
Mahay, 39, appeared in 41 games for the Twins last year and posted a 3.44 ERA with a 42.5% ground ball rate, 6.6 K/9 and 2.1 BB/9. In 14 big league seasons, Mahay has posted 7.9 K/9 and 2.9 BB/9 against left-handed hitters.