Jets at heart of Mark Sanchez, Eva Longoria split?

Could the Jets be to blame for the recent breakup of Mark Sanchez and Eva Longoria?

Sources told TMZ.com the couple broke up because the Jets quarterback was always in a bad mood because of his team's less-than-stellar season.

"It's hard to maintain a relationship when one person is upset all the time," a source told the site.

However, according to the site, the 37-year-old actress and 25-year-old football stud have "nothing but respect for each other" and plan to remain friends.

The two started dating this fall.