Quarterback Alex Smith, according to a league source, is considering changing agents. Tom Condon has been Smith’s agent since he was the top overall selection in 2005, and has done several contracts with the 49ers for Smith.

But Condon is also the agent for Peyton Manning, the player the 49ers are now courting. Thus, it makes sense for Smith to seek different representation because of the obvious conflict of interest. The 49ers are one of three teams Manning is considering along with the Broncos and Titans.

Reportedly, 49ers coach Jim Harbaugh and offensive coordinator Greg Roman traveled to North Carolina Tuesday to work out Manning. Subsequently, team doctors have checked out Manning, who has undergone four neck surgeries.

Manning would demand a huge contract and Denver reportedly is offering a five-year, $90 million deal. Denver and Tennessee both have far more room under the cap than San Francisco, however, the 49ers have plenty of cap space to make a legitimate offer to Manning.

Also, according to a league source, the 49ers have offered Smith a three-year, $24 million deal that Smith is currently weighing. A call to Smith was not immediately returned.

No one is quite sure why the 49ers became suddenly interested in Manning after general manager Trent Baalke said signing Manning had not even been discussed internally as of two weeks ago. Some speculate that the interest in Manning is a tactic to get Smith to accept their offer.

Manning is expected to make a decision on where he will sign early next week.