It had nothing to do with Yevoli playing at UVa or 'Cuse strictly for wins.
1) 'Cuse is closer to his home. Family is important to some people
2) He had graduated from UVa and is going to Graduate school. Dom Starsia couldn't get him any scholarship money for grad school, unlike the tons of cash he got for undergraduate years. 'Cuse would give him money, so he made the smart financial choice - lots of people do it.
3) He has a ring...from Virginia. I'm sure he didn't take it too badly.

Yevoli even said he didn't dislike UVa or Starsia for what happened, he just had to make the right choice for him. Life isn't about W's and L'w or rings in lacrosse.