He's a plus defender. Yes, power is probably the biggest concern with him. I did a little digging on BA and found this: Ranked Chicago Cubs #12 prospect after the 2012 season Blocked by Adrian Beltre and Mike Olt in Texas, Villanueva's chances for future playing time improved dramatically when the Rangers dealt him and strike-throwing righthander Kyle Hendricks to the Cubs for Ryan Dempster. He still has to worry about Jeimer Candelario and perhaps Javier Baez (if he moves to third base), but Villanueva suddenly has a lot more upward mobility. On the 20-80 scouting scale, one Cubs official described him as having 80 makeup, 70 defense and questionable power. Villanueva's short stroke is conducive to line drives more than longballs, and he tends to inside-out quality fastballs and serve them to the opposite field. He has the potential for average power, but he'll have to get stronger and turn on more pitches to get there. He can hit for solid average and provide some doubles. He has fringy speed but has the instincts to steal bases if the defense doesn't pay attention to him. Defense is where Villanueva really shines. He has the first-step quickness, hands, arm strength and savvy to make tough plays look routine. Chicago added him to its 40-man roster and will send him to Double-A in 2013. He could get a big league audition sometime the following year. He sounds like right handed Bill Mueller to me.