Wes Welker sure knows how to pick his quarterbacks. The star receiver, Tom Brady’s favorite target, is leaving New England and heading to Denver, where he’ll join Peyton Manning and the Broncos. Also getting new deals were Reggie Bush in Detroit, Dashon Goldson in Tampa Bay, and even Ray Lewis — with ESPN. Day 2 of the NFL’s free agency frenzy was highlighted by Welker grabbing a two-year deal with the Broncos, who had the AFC’s best regular-season record last year. He gives Manning one of the steadiest targets the four-time league MVP ever has had. Broncos boss John Elway …