Colin Kaepernick has learned a thing or two from Peyton Manning.
He just refuses to say what or offer any specifics. The mystery man under center for the San Francisco 49ers will play opposite Manning when the quarterbacks’ teams meet in their exhibition opener Thursday night in San Francisco — offering plenty of intrigue, even if each is unlikely to play more than a quarter.
Kaepernick said he met Manning before his senior season at Nevada, at the Manning Passing Academy.
Any message from Manning?
“He shared a lot of different things with all of the quarterbacks that were there,” Kaepernick said.
Anything specific that stuck with you, Colin?
Kaepernick: “Just tips, on the field, off the field, how he prepared for games.”
Anything you apply to this day?
Kaepernick: “All of them.”
New 49ers wideout Anquan Boldin, acquired from the Super Bowl champion Baltimore Ravens during the offseason, is eager to see how he and Kaepernick do in their first game together.
San Francisco coach Jim Harbaugh is anticipating seeing Kaepernick and Boldin in a game atmosphere for the first time in what could be a dynamic combination for the Niners.
“Eager, eager, I’m jumping out of my skin,” Harbaugh said. “I really feel like they’re going to be jumping out of their skin ready to play this game.”
BROWNS’ RICHARDSON TO SIT OUT THURSDAY
The Browns are playing it safe with Trent Richardson.
Cleveland’s star running back will not play in the club’s exhibition opener Thursday against the St. Louis Rams as he continues to recover from an injured right shin. Richardson was accidentally kicked in the shin — the same one he hurt during spring practice — last week, and the Browns won’t risk him hurting it further.
“We’re going to be smart,” coach Rob Chudzinski said .
Chudzinski said Richardson could have played if it was a regular-season game, but the Browns are being careful with the former first-round pick, who has had a history with injuries and played most of last season with two broken ribs.
Richardson did not play in any of Cleveland’s exhibition games last year as a rookie because he was recovering from minor knee surgery.
He finished the season with 950 yards rushing and 51 catches for 367 yards. He played in 15 games, missing the finale at Pittsburgh with an ankle injury sustained the previous week at Denver.
JAGUARS CLAIM FORMER SEAHAWKS WR MARTIN
Wide receiver Charly Martin was claimed off waivers by the Jacksonville Jaguars. He had been placed on waivers by the 49ers on Tuesday after less than a month with the team.
Martin, who was born in Walla Walla, played four games last season for the Seattle Seahawks, who waived him July 12.
He has spent time with five teams in five NFL seasons and has five career catches — four of them last year with the Seahawks.
Bears cornerback Kelvin Hayden will miss the season after tearing his left hamstring during practice. … The Saints lost wide receiver Joseph Morgan (left knee) and defensive end Kenyon Coleman (torn pectoral muscle) for the season. … Former Jets offensive lineman Brandon Moore backed out of a one-year contract a day after agreeing to terms with the Cowboys. He plans to retire. … Florida prosecutors have dropped child-abuse charges against former Dolphins receiver Mark Duper. Duper had been accused of punching, body-slamming and choking his 17-year-old son last March. Former NFL star Hugh Green witnessed the incident and said Duper’s son started the fight, and Duper was only defending himself.