Halladay on DL

The Philles had to place the 8 time All Star P Roy Halladay on the disabled list today. This was due to a strained lat muscle in Halladay's right shoulder area. However, upon father review the Phillies are now saying that Halladay will be shut down for at least a minimum of 3 weeks but it could be longer.  So what does that mean as to the rest of the season for Roy? It will just depend on how that shoulder is doing in my opinion.