Given about 40 hours to reflect, Jim Harbaugh would only acknowledge the obvious Tuesday: Why, yes, he wishes the 49ers had called a play that gained 5 yards during the last two minutes of the Super Bowl.

Harbaugh, predictably, wasn’t in the mood for public self-flagellation when asked about San Francisco’s much-scrutinized play-calling at the end of its 34-31 loss to the Ravens on Sunday.

Facing 2nd-and-goal at the 5-yard line, Colin Kaepernick tossed three straight incompletions which were intended for wide receiver Michael Crabtree. Kaepernick said he called an audible on fourth down when he saw Crabtree matched up in single coverage against Ravens cornerback Jimmy Smith.

Baltimore, which was without injured Pro Bowl nose tackle Haloti Ngata, allowed 129 rushing yards and 9.2 yards per carry in the second half.

“Certainly, knowing how it ended up, how it finished, we didn’t get the ball in, yeah, would’ve liked to have tried a different play call, a different scenario,” Harbaugh said. “That’s the way I always feel. If you do something and it doesn’t work, yeah, would’ve liked to have done something different, at least tried it. But you can’t.”

Harbaugh then trotted out one of his standard lines when a coaching strategy is second-guessed by the media: “The would’ve, could’ve, should’ve is undefeated,” he said. “That’s never failed.”

On Sunday, though, it was some of Harbaugh’s players who were doing the second-guessing.

“That’s the one thing we talked about: ‘Why didn’t we run it?’ ” tight end Delanie Walker said. “We don’t know. We were running the ball on them all day.”

Poor effort? The ball sailed, but Randy Moss didn’t soar along with it.

The 49ers’ wide receiver has been criticized for a perceived lack of effort on Kaepernick’s interception in the second quarter on Sunday. Kaepernick’s pass was high and Moss, who stopped his route, didn’t jump for the ball, which was picked off by Ravens safety Ed Reed.