49ers injury report: Crabtree sits out with nagging calf

49ers injury report: Crabtree sits out with nagging calf
September 3, 2014, 5:00 pm
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Michael Crabtree has only played two complete seasons in his five years in the NFL. (USATSI)

SANTA CLARA –- Wide receiver Michael Crabtree was held out of practice Wednesday due to a calf injury, the 49ers disclosed on their mandatory participation report.

[RELATED: Boone is 'working in' with 49ers' offense]

It's the second leg injury for Crabtree from the start of training camp up to the 49ers' first regular-season game. He sustained a hamstring injury that kept in out of action for 16 days during training camp. Crabtree's availability for the regular-season opener on Sunday against the Dallas Cowboys is not known.

Crabtree is not the only 49ers’ starter whose status is in question. Right tackle Anthony Davis, who did not suit up for an exhibition game due to offseason shoulder surgery, now has a problematic hamstring.

Davis did not practice on Wednesday. If he is unable to play in Sunday’s game, veteran Jonathan Martin is in line to make the start. Martin lined up at right tackle throughout training camp in Davis’ absence.

49ERS
Did not participate
WR Michael Crabtree (calf)
OT Anthony Davis (hamstring)
C Marcus Martin (knee)

COWBOYS
Did not participate
DE Anthony Spencer (knee)
T Darrion Weems (shoulder)

Limited participation
DT Terrell McClain (ankle)
DE George Selvie (shoulder)

Full participation
QB Tony Romo (back)