D.C. United captain Dax McCarty has recovered from a groin ailment that sidelined him for both West Coast matches and is likely to start Saturday night against the San Jose Earthquakes at RFK Stadium.

“I was pretty frustrated for a week or so with a little nagging injury that you really don’t even understand how you pick up,” the central midfielder said after Friday’s training session. “I feel like I am good to go and fairly close to 100 percent. I lost maybe a tiny bit of fitness, but nothing to dramatic.”

Midfielder-forward Santino Quaranta (concussion) remains outand hasn’t been training. “He’s still struggling,” Coach Ben Olsen said.

Defender Marc Burch (hamstring) is still sidelined. Midfielder Kurt Morsink (ankle) says he is about a week from returning. Defender Jed Zayner (hamstring) is working on fitness after a long layoff and could return soon.

For additional notes.....

Forward Josh Wolff played seven seasons for Kansas City before signing with United over the winter. So what did he think of Livestrong Sporting Park, which was christened on national TV last night?

“Great stadium, great stadium ... everything after that, it wasn’t a great game,” he said. “Those owners have done an outstanding job building a top-notch stadium. It makes this game go; every team needs it. Hopefully D.C. gets one soon. It’s imperative in order for the game to continue to grow, to attract new fans and bigger sponsors. [LSP] is outrageously nice.”

TV coverage Saturday: Comcast SportsNet at 7:30 p.m.

Attendance: I’m guessing 13,000.

A new field has been laid out at RFK to better combat the summer heat.

Courtesy of DCU communications ace Alex Caulfield, the two MLS players with the longest last names (14 letters) could face one another Saturday: United’s Blake Brettschneider and San Jose’s Anthony Ampaipitakwong. The Earthquakes midfielder wins the tiebreaker on first names (7-5).