"Huge strides" is probably an exaggeration. Ian Desmond is a pretty good comp for the career path Lake is on right now. Low walks, high strikeouts, poor fielding, but with a bit of pop and some speed. Desmond grades out as a somewhat below average regular, with fWAR totals of 1.3 and 1.4 the last two years. If Lake takes a good step forward in any one of those categories (or numerous small strides), that would make him a league-average starter. He'd still be young, cost-controlled, and have considerable upside beyond that. As long as Lake is making some forward progress it doesn't make much sense to cash in a chip like that just to gamble he might be a closer someday. i get serious indigestion every time i read that Lake and Vitters have "huge upside"; it's so ignorant to overlook their total cluelessness of the strike zone or inability to field their position and hope that's somehow able to drastically change; their upside is to i guess suppress these problems just enough to sneak their way into the majors for a few seasons hey if Ryan Harvey can fix his inability to hit the ball...look out- he could be a good one! think Cubs shortstops, circa 2006