Gregerson, 29, has a career 2.88 ERA in 363 games for the San Diego Padres. In 2013, Gregerson went 6-8 with a 2.71 ERA in 73 appearances. Over his career, only 21% of inherited runners score off Gregerson, making him a valuable reliever in tough situations. The righty is good against left-handed hitters, allowing a .242 BAA against them over his career. He's dominant against righties, however, allowing only a .191 BAA against them. He will add to this now stacked Athletics bullpen.
The Padres will be receiving outfielder Seth Smith. Smith, 31, has a career .265/.342/.456 slash line as an outfielder for the Rockies (2007-2011) and Athletics (2012-2013). In 2013, Smith hit .253/.329/.391 with 8 home runs and 40 RBI. This is something that you can expect on a yearly basis from Smith. He posted a .320 BABIP in 2013, which oddly is a little inflated, although he posted numbers lower than his career averages. It's possible that he could be on the downside of his career, or on the verge of breakout.