Rockies shortstop Troy Tulowitzki finally got a diagnosis of his injury, and it wasn’t good — a groin injury that will require surgery, to be performed by Dr. William Meyers Thursday in Philadelphia.

Rockies GM Dan O’Dowd has the bad news for the team’s fans. Troy Renck:

“That’s a blessing knowing what it is, but the downside of that is more than likely he’s lost for eight weeks. That’s what we are planning on and will adjust off that,” general manager Dan O’Dowd told The Denver Post. “Like any club, we are built around our best players. Even if we were having an average year rather than a bad year, losing him would be problematic.”

That would put Tulowitzki out until late August at best; he’d likely have to go on another rehab assignment before returning. With the year the Rockies are having — currently with the third-worst record in baseball — it might almost be better for him to simply wait and come back in 2013.

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