Red Sox's Eduardo Rodriguez: Working on slider, cutter

Rodriguez has been working this offseason to improve the precision of his slider and the introduction of a cutter, the Providence Journal reports.

The slider is seen as a critical third pitch for the left-hander against whom lefty hitters had a measure of success. Seven of his 13 homers surrendered were to left-handed hitters, and lefties slugged 159 points higher against him than righties.