De La Rosa appeared in five games for the Rays last season, allowing seven runs over five innings. He made his major league debut in 2011, allowing eight runs over 7 1/3 innings.
The 30-year-old spent a majority of last year with the Rays' Triple-A affiliate. He maintained an ERA of 2.79 over 67 2/3 innings with a strikeout-to-walk ratio (SO/BB) of 2.07. Over parts of nine seasons in the minors, he owns a career ERA of 3.75 with 2.45 SO/BB.
Geltz made his major league debut last season, allowing one run over two innings. He spent much of the season with Los Angeles' Double- and Triple-A affiliates. Over a combined 46 appearances, the 25-year-old posted a 3.05 ERA with 3.50 SO/BB. Over parts of five seasons in the minors, he owns a career ERA of 3.69 with 3.31 SO/BB.