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Kyle Lohse earns an honorable mention as one to keep an eye on in the second half.
Stats: 5-5, 3.90 ERA, 82 SO, 1.43 WHIP
While C.J. Wilson's stats are mediocre this year, his intangibles earn him an honorable mention as one to watch in the second half of this MLB season.
Wilson hasn't seemed the same since he left Texas to become an Anaheim Angel. He does, however, have all the skills to be a Cy Young pitcher.
While it would appear as if Wilson is destined for another season of mediocrity, fans should keep their eye on him.
Wilson has been a streaky pitcher this year. He has had a four-game win streak and two losing streaks of three games each.
Fans should keep their eye on Wilson, though, because he is currently coming off a three-game skid.
If his performances from earlier this season are any indication of the future, Wilson should right the ship soon and string together some wins.
Stats: 12 SV, 4.05 ERA, 30 SO, 1.54 WHIP
Heath Bell had a rough start to his tenure with the Arizona Diamondbacks.
Bell allowed four runs in his first 2.1 innings of work in the desert. It seemed like Bell was destined for another season of disappointment.
Things began to turn around for the 35-year-old closer on May 7, though.
Since then, Bell has racked up 11 saves in 15 appearances.
The injury bug bit the Diamondbacks this year, but Bell has stabilized their closing role.
If Bell continues to assume closing duties for the D-Backs, he's someone to keep an eye on in the second half.
Stats: 2-6, 4.03 ERA, 46 SO, 1.24 WHIP
Milwaukee signed Kyle Lohse with the hopes that he would be one of its top-end starters.
Lohse's numbers are not great. Actually, they're pretty bad for a guy who was supposed to solidify Milwaukee's rotation.
Lohse, however, had an amazing second half last year.
The right-hander only lost one game between July and September. He also had a post-All-Star Game ERA of 2.95.
Brewers fans hope that Lohse can have a similar second half this year. If he does, he will be a pitcher to keep an eye on.