Jim Harbaugh didn't spend any time wallowing Monday after the most lopsided loss in his two seasons as coach of the San Francisco 49ers.

He has only three days to prepare his team for Thursday's key NFC West game against Seattle, and he might have to do it without the services of Pro Bowl offensive tackle Joe Staley.

Staley is visiting a neurologist after suffering a concussion during Sunday's 26-3 loss to the New York Giants, who recorded six sacks while winning a physical battle in the trenches on both sides of the line.

Harbaugh has little time to look back at that puzzling performance with his defending NFC West champions (4-2) locked in a three-way tie for first place in the division with the Seahawks and the Arizona Cardinals.