St. Louis Cardinals first baseman Lance Berkman is set to be activated from the disabled list this weekend when rosters expand, reports Jenifer Langosch of MLB.com:

Lance Berkman finished stint w/ Triple-A Memphis today. Went 1-for-1, removed for PR in 1st b/c of rain. He'll be activated from DL on Sat.

— Jenifer Langosch (@LangoschMLB) August 31, 2012

The 36-year-old Berkman has played well for the Cardinals this season when healthy, hitting .267/.389/.467 in twenty-eight games, but has been languishing on the disabled list with leg issues for most of the season.

Sidelined by calf injuries early in the season, Berkman then tore his meniscus at the end of May and missed a month and a half recovering from surgery to repair the tear. His latest trip to the DL, his third on the year, was for inflammation in his surgically-repaired right knee.

Allen Craig has filled in incredibly well at first base in Berkman's absence, batting .313/.371/.572 with twenty home runs in eight-eight games, so it is unclear how playing time at the position will be doled out upon the Big Puma's return.