Hard to say for sure, but Landon Donovan might still be a little upset about not going to last year's World Cup.
Love the enthusiasm and veteran presence of @AbbyWambach despite not playing much. That kind of leadership is priceless during a WC— Landon Donovan (@landondonovan) July 1, 2015
Hmmm... I wonder if he could be referring to someone else who might have been able to serve as a leader during a World Cup. The world may never know.
UPDATE: Alexi Lalas has jokes too, and he doesn't quite agree with Landon:
SB Nation presents: The future stars of the USMNT