Allot of people were freaked out and when they saw Joba Chamberlain come on in the ninth inning instead of Enter Sandman and Mariano Rivera.  Rivera wasn't available due to stiffness on his left side.  According to Giradi he is day-to-day and could be ready to go tomorrow.  We will see, but if you own Rivera it might be smart to get Chamberlain just in case this turns into three or four days.  Rivera is 40 years old and no spring chicken.