Is Mo healthy? Struggles make you wonder

"The Yankees have, of course, completely restructured the bridge to Rivera with youngsters. Joba Chamberlain has been lights out since coming up from Scranton. Newly-recalled Sean Henn and Edwar Ramirez combined for four shutout innings yesterday, showing that they can contribute. Luis Vizcaino has been solid for the past two months. None of that is going to matter, though, if Rivera isn't Rivera. The Yankees, with baseball's best offense, might be able to bash their way to a wild-card berth without him but it won't make any difference. An early playoff exit would await if Rivera is injured or ineffective. "