Both Nunez and Ramirez from KC have had good seasons. Ramirez has 22Ks in 18IP.
Aqualino Lopez has had a quietly good season for DET this season.
Scott Downs and Jesse Carlson have both had good starts in TOR.
Octavio Dotel has had ridiculous K/9 in CHI this season (27Ks in 17.2IP). His ratios aren't as low as some of these guys, but that's mostly due to his first couple appearances. In his last 10 apps he's allowed only one earned run total.