Steven mentions that his sister Hayley was giving the coach a Rod Carew in the parking lot. Rod Carew was a Major League Baseball player for the Minnesota Twins and California Angels in the 1970s and 1980s. In addition to being the only major leaguer to ever be born in a train, he was one of the most prolific hitters of his generation. It should be noted that Steve is using R"od Carew" as rhyming slang for "screw".
Easiest way would be to Highlander it. Now that the rest of the Timelords are gone, the regeneration energy is unlimited. Which would explain the deus ex machina "human Doctor" from the last season finale.