Through 10 matches, it's even steven between Bruce Arena and Frank Yallop.
That's the way it stands ahead of Saturday night's California Clasico between the San Jose Earthquakes and LA Galaxy (10 pm ET, ESPN2, live chat on MLSsoccer.com). Each man has three wins against the other, with four draws making up the difference. A win or a loss tonight in front of a national audience would provide some sort of separation between two managers who have established themselves among Major League Soccer's best, but only started facing off in the past five years.
Overall, Arena holds the edge as an MLS manager, compiling a 134-82-42 record in stints with D.C. United, the New York Red Bulls and LA Galaxy. Yallop's not far behind in the win column, though. He possesses a 105-98-72 record during two stops in San Jose sandwiched around a few years in Los Angeles.
Here's the list of head-to-head meetings between the two as provided by the Elias Sports Bureau, the official statisticians of MLS:
August 18, 2007: NY 5 - LA 4 (Arena)
October 18, 2007: LA 1 - NY 1 (draw)
April 18, 2009: SJ 1 - LA 1 (draw)
June 20, 2009: SJ 2 - LA 1 (Yallop)
October 24, 2009: LA 2 - SJ 0 (Arena)
July 22, 2010: LA 2 - SJ 2 (draw)
August 21, 2010: SJ 1 - LA 0 (Yallop)
June 25, 2011: SJ 0 - LA 0 (draw)
August 20, 2011: LA 2 - SJ 0 (Arena)
May 23, 2012: SJ 3 - LA 2 (Yallop)