Like Molina, the White Sox will be watching Simon Castro in spring training for his future potential. Castro, whom the White Sox acquired from the San Diego Padres in the Carlos Quentin trade, looks like a nice prospect as long as his core statistics aren't examined.
After posting a 3.29 earned run average in 140 innings in 2010, Castro had a 5.63 earned run average. However, his walks-per-nine-innings rates were identical (2.7), and his 2011 strikeouts-per-nine-innings rate was slightly higher (7.4) than in 2010 (7.3).
Both seasons saw him pitching mostly at Double-A and a little bit at Triple-A.
Castro didn't strike out as many batters as he rose through the ranks, but he did walk fewer batters.
He isn't an amazing strikeout pitcher, but at least he has good control. White Sox fans should be interested to see if he can maintain that control in spring training.
Molina, who projects higher than Castro, seems to have the inside edge to advance in the White Sox system. His measurables are better than Castro's, even though Castro's stuff is somewhat better. Also, Molina has been steadier in his rise through the minors.
Castro, a two-time Top-100 Baseball America prospect (2010, 2011), has much to prove in spring training. He'll have to make the most of his spring training outings, keeping scoring down and showing a great deal of control with pitches.
Since his avoidance of walks isn't as impressive as Molina's, Castro will have to work hard to show that he can be better than Molina.