“Early Show” anchor Maggie Rodriguez begins her ma ternity leave today, with week end “TES” co-anchor Erica Hill filling in (while continu ing to work her weekend shift). “TES,” meanwhile, eked out a victory over “Today” Friday — in softball (14-13).

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Hutch Dano and Adam Hicks, who headline Disney XD’s “Zeke and Luther,” will host “Next X,” a new reality sports series premiering Monday, June 21 (7:15 p.m.) on Disney XD. The se ries will feature pro skateboard ers Bucky Lasek and Rune Glif berg (great name) and professional BMX riders Daniel Dhers and Gary Young. They’ll work with amateurs, one of whom will eventually be named the “Next X” and get the chance to perform at X Games 16 in LA at the end of next month.

And speaking of contests . . . the USTA hosts its fourth annual US Open Casting Call, to select singers ages 12 and younger, to perform the na tional anthem, live, at the US Open (Arthur Ashe Sta dium). The au ditions take place tomor row (9 a.m.-2 p.m.) at Radio City; judges are ex- Pussy cat Doll and actress Ashley Roberts and Justin Chon and Alex Meraz (“Twilight Saga”).

Last, but not least:

* Bloomberg TV’s Marga ret Brennan reports live today from Pensacola (10 a.m.-noon) on the BP oil spill . . . Singer/actress Jennifer Holliday (“Alley McBeal”) performs at today’s Center for Urban Community Serv ices fundraiser . . . Brenda Strong, Olivia Palermo downing Appleton Estate rum at the “Cyrus” bash . . . Ch. 4’s Lynda Baquero em cees the Boys & Girls Har bor’s “Salute to Achievement” gala (6:30 to night, Mandarin Oriental) . . . “Bachelorette” Ali has a date aboard The Intrepid on to night’s show.