Sam Evans
Wikipedia
Glee Character Guide
Sam Evans is a transfer student who joins the football team in season two. Encouraged by Finn to audition for New Directions, he joins the males of the group in a performance of "Billionaire." Despite some trepidation about the effect it may have on his social status, Sam eventually joins the glee club.
With the connivance of Finn and Rachel, he and Quinn are partnered together, and win a duet competition within the group, after which their victory dinner turns into a first date; the victory later nets them a lead performance at sectionals. This begins a relationship between Sam and Quinn. But, Quinn is later unfaithful to him, since she rekindled her romance with Finn. In the episode "Comeback", Sam makes a last-ditch attempt to win her back, but ends the relationship after finding out from Santana that Quinn cheated on him with Finn.
At some point after going to junior prom together, Sam and Mercedes start to secretly date. His family moves to Kentucky over the summer, but Finn and Rachel convince him to come back to New Directions late that fall in time to compete in Sectionals. Although Mercedes has a new boyfriend, he wants to get her back. In season four, he develops friendships with Blaine and Brittany, the latter of which becomes a romantic relationship.
With the connivance of Finn and Rachel, he and Quinn are partnered together, and win a duet competition within the group, after which their victory dinner turns into a first date; the victory later nets them a lead performance at sectionals. This begins a relationship between Sam and Quinn. But, Quinn is later unfaithful to him, since she rekindled her romance with Finn. In the episode "Comeback", Sam makes a last-ditch attempt to win her back, but ends the relationship after finding out from Santana that Quinn cheated on him with Finn.
At some point after going to junior prom together, Sam and Mercedes start to secretly date. His family moves to Kentucky over the summer, but Finn and Rachel convince him to come back to New Directions late that fall in time to compete in Sectionals. Although Mercedes has a new boyfriend, he wants to get her back. In season four, he develops friendships with Blaine and Brittany, the latter of which becomes a romantic relationship.