Phil Mickelson after Tuesday’s practice round. (Matt Slocum / AP)

The afternoon groups are teeing off in the U.S. Open at Congressional Country Club and the some of the key pairings to watch are:

1:24 p.m. — Miguel Angel Jimenez, Sergio Garcia, Alvaro Quiros

1:25 p.m. — Phil Mickelson, the birthday boy (41), Rory McIlroy and Dustin Johnson

1:35 p.m. — Francesco Molinari, Edoardo Molinari and Matteo Manassero

1:57 p.m. — One-half of the Golf Boys, Rickie Fowler and Hunter Mahan, join Ian Poulter.