Jim Harbaugh San Francisco 49ersYou can’t talk about a Seattle Seahawks home game without talking about the 12th man and their home field advantage, so it’s only natural that 49ers fans would be faced with comparing themselves to it when their northwestern rivals march into San Francisco.

Jim Harbaugh was asked about enjoying a similar homefield advantage when the 49ers debut Levi’s Stadium next year, but the coach doesn’t want to wait that long.

“I hope for that this week,” Harbaugh said. “If this doesn’t fire up the fans, then what does?”

A great question, but the coach didn’t give much time to answer before he came up with his own.

“I suppose Abraham Lincoln, riding across the field with a frock and a top hat, riding a horse, waving an American flag,” he said.

Harbaugh has always hinted at his fascination with history, so the fact that he pulled out this analogy isn’t surprising. I just didn’t know what a frock was, so I looked it up (this isn’t the first time Harbaugh pulled a thousand-dollar word on the media).

A frock is a loose outer garment or dress, and it’s usually associated with women’s clothing. A frock coat appears to be more something Lincoln would wear. Or maybe he’s actually suggesting Lincoln ride across Bill Walsh Field on a horse in women’s garb. That very well could get Candlestick rocking.

Other Harbaugh highlights

— The coach wouldn’t commit one way or another on either Joe Staley or Mike Iupati for Sunday’s game, but said he was encouraged by how the line performed without them. Both Staley and Iupati were walking better, but there are no guarantees either will see action against the Seahawks.

— Harbaugh got a little dreamy talking about Russell Wilson.

“He’s a fantastic player,” he said. “Arm talent, mobility. Great field awareness — he understands the scrambling lanes and escape routes out of the pocket. And then that feel that only so many quarterbacks have who have ever played the game to extend plays.”

But when Cam Inman asked if Colin Kaepernick shared the same improvisation skills, Harbaugh got a little more general.

“They’re both great quarterbacks,” he said. “And they both throw really well from the pocket too.”

— Just about a year removed from Justin Smith’s triceps injury, Harbaugh was complimentary of his defensive anchor.

“He’s playing with a lot of strength. He’s one of those guys that’s rare. If it was bothering him, if he had less strength, you would never know it and he wouldn’t say anything about it,” Harbaugh said.

He also said the emergence of Tony Jerod-Eddie and Demarcus Dobbs has allowed him to give Smith more of a rest over the course of the season. To this point, Smith has played the fewest snaps of his entire career.

— The coach wouldn’t refer to the 49ers’ recent running issues as “struggles,” instead saying simply, “it’s football.”

“Frank does so many things for our offense,” he said. “People rush in and call it a struggle if you don’t rush for 100 yards in a game, I don’t see it that way.”