The USA international, who has just finished a 10-week loan spell with Everton, returned to David Beckham's club, LA Galaxy, on Monday.
Galaxy midfielder Chris Klein joked: 'We're tanned and ready to go, and he looks like he's been hiding in a closet for a few months.'
White van man: Donovan has been teased over his tan after returning to LA
'He does looks pale,' added Galaxy head coach Bruce Arena. 'Those are the hazards of living in England.'
But Arena believes Donovan, who could face England in the World Cup, has profited from playing in the Premier League.
After largely unsuccessful spells at Bayer Leverkusen and Bayern Munich, the 28-year-old needed to know he could hold his own outside Major League Soccer.
Good times: Donovan will benefit from his experience at Everton, says boss Arena
Arena said: 'It was beneficial for him. Probably more mentally than the games themselves because he always had the tools to be able to compete at that level.
'He demonstrated more to himself that he can do that. I think he comes back a more confident player.'
Donovan confirms Everton spell is over as he focuses on LA GalaxySouth Africa and Everton star Steven Pienaar dismisses England's chances of World Cup gloryEVERTON FC