The Yankees haven't even had a lead to protect in over a week, so maybe they won't even need to look for a replacement while Mariano rests.During Thursday's post-game show on the YES Network, Yankees manager Joe Girardi revealed that Mariano Rivera's surgically repaired shoulder has been bothering him. The news came minutes after Rivera suffered his first loss of the season, allowing two home runs to the Rays after entering a tie game in the ninth inning. His velocity has taken a noticeable dip and he may need a few days off.