Free-agent outfielder Grady Sizemore underwent microfacture right knee surgery in September and will be unavailable for the start of the 2013 season, Anthony Castrovince of MLB.com reported Monday.

Sizemore attempted to work his way back from the knee injuries that have plagued his career since 2009 and avoid the surgery, but he missed the entire 2012 season in the process. The 30-year-old has played in just 210 games since 2009 with a .234/.314/.413 (98 OPS+) line; he hit .281/.372/.496 (128 OPS+) and missed just nine games total from 2005 through 2008. He has spent his previous eight years in the big leagues with Cleveland.

Castrovince says several clubs have inquired about Sizemore's availability, but the prognosis on his knee suggests he won't be able to suit up until midseason at the earliest. The microfracture surgery is Sizemore's second, with the first coming on his left knee in June 2010.

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