The Los Angeles Dodgers insist there's no reason for alarm, but it's difficult to have any other reaction after the team announced that starter Zack Greinke received a lubricating injection in his elbow earlier in the week . As a result, Greinke will not throw off a mound this weekend, but is expected to resume a regular routine in the coming days, since apparently the injection itself is also a part of his normal spring training routine. "It's pretty much been a common spring thing since we've had him," manager Don Mattingly said early Saturday concerning the injection. [ Baseball is back! Check out Yahoo For Spring Training for great spring training pics. ] How common? According to Mattingly, Greinke has received the injection in each of his three seasons with the Dodgers. So far, it hasn't been an issue though. Aside from Greinke missing a month early in the 2013 season with a broken collarbone suffered in an on-field altercation with Carlos Quentin of the San Diego Padres, Greinke has made all of his starts and posted a sub-2.71 ERA each year. As the Dodgers suggest, it probably really is nothing to be concerned about. B ut just the fact he's needed the injection three...