Astros first base prospect Jonathan Singleton went 2-for-4 with a solo homer on Monday for the Triple-A Oklahoma City. After a brief slump, Singleton has hit .444/.524/.889 with two doubles and two homers over his past five games. More importantly, he has walked eight times and struck out only four times in his past 42 plate appearances. If he can keep his strikeouts down while picking up walks and hitting for power, he could make a big splash in Houston. He is likely to be up in early June.