Qualls was 3-4 with a 7.32 in 70 games split between the D-Backs and Rays last year. Lifetime the 32 year old is 32-26 with a 3.82.
If Pads sign him, it would presumably be to fill the void created when right handers Adam Russell, Edward Mujica, and Ryan Webb were traded earlier this off season. He made $4.185M last season. In 2009 he went 2-2, with a 3.63 in 51 games for the snakes.