FanDuel Price: $2,800

Welington Castillo is a guy whose dramatic platoon splits tends to leave him under-priced when he draws a favorable matchup.

He struggles against righties, but he absolutely smashed southpaws in 2016, posting a .367 wOBA and .243 isolated slugging (ISO) on an absurd 53.5% hard-hit rate. With a career .360 wOBA and 40.0% hard-hit rate against lefties, those numbers are no fluke.

While J.A. Happ posted a nice 3.18 ERA for the Toronto Blue Jays last season, he did that with a 4.28 skill-interactive ERA (SIERA), indicating that he wasn't throwing nearly as well as that ERA would have you believe. Right-handed hitters fared decently well against him, tagging him for a 4.19 xFIP and 30.4% hard-hit rate last season.