John McLaren is moving from bench coach to interim manager of the Nationals following the resignation of Jim Riggleman, according to an ESPN.com report. McLaren's duties began Friday when the Nationals opened a three-game series against the White Sox at U.S. Cellular Field. The Nationals had won 11 of 12 before Riggleman quit after a 1-0 win over the Mariners on Thursday, saying he felt the franchise wasn't committed to him over the long term.