It's being reported that Steve Blake will undergo surgery to repair a torn abdominal muscle, which will put him out of commission for six to eight weeks. Since he's up there in years, it may take him longer to recover, making eight weeks the more likely guess.
He's been out for an abdominal strain since November 11, which was diagnosed with an MRI. No word on when or how they discovered it was more than that, which is predictable since the Lakers are fairly secretive about that kind of thing.
This isn't a huge blow to the Lakers, though.
Darius Morris has stepped up in the PG position with the absence of both Blake and Steve Nash. He's averaging 5.9 points and 2.5 assists in 22.3 minutes. Blake's numbers were similar with 5.1 points and 3.4 assists in 26 minutes. The big difference though, is that Morris is worlds faster than Blake is, which is so important in this high-speed D'Antoni system.
Nash, despite his age, is still very quick and agile, so Morris makes the most sense as the number two backup.
Chris Duhon is also getting a lot of time in Blake's absence, averaging 3 points and 2.8 assists in 19 minutes, and he knows the D'Antoni system since he played for the coach. Still though, he's not as fast as Morris.
While Blake is certainly a veteran presence, and can get pretty scrappy, his absence from surgery won't be much of a blow to the team.