Chris Archer - Tampa Bay Rays
Archer has a 4-0 record with a 1.29 ERA in the month of July, recording 2 CG shutouts over 42.0 IP in 6 starts. He's allowed just 6 earned runs, walking 10 and striking out 25. Chris has showed his ability to go the distance while maintaining reasonable pitch counts. He's become a much more mature and efficient pitcher than when he made his debut in 2012.
Felix Hernandez - Seattle Mariners
King Felix has been rock-solid all year, as usual. While teammate Hisashi Iwakuma has struggled over the last month, Hernandez has posted a phenomenal 3-0 record in 5 starts, pitching 37.0 innings to a 1.22 ERA. His 7/1 K/BB ratio is the best in the league in that span, and the King has held opponents to a .215 avg. and a 0.92 WHIP. Hernandez will likely be a frontrunner for the year's AL Cy Young, and he has definitely added to his case over the last four weeks.
Matt Moore - Tampa Bay Rays
The Rays can pitch. A rotation of their caliber is incredibly rare in the Junior Circuit, but Joe Maddon's crew has ended up together quite nicely. Matt Moore has been the most dominant pitcher in the American League over the last month. His stats: 4 GS, 4-0, 0.91 ERA, 29.2 IP, 8 BB, 29 K, .124 avg., 0.67 WHIP, 1 CG, 1 SHO. Enough said.
Wily Peralta - Milwaukee Brewers
2-1 in 5 starts understates yet another good pitcher for a bad ball club. Despite his record, Peralta has pitched to a 1.64 ERA in 33.0 IP, throwing a complete-game shutout in the process. He's struck out 28, though walked 13, but has kept opponents to a .200 batting average. Wily may not be an ace in the making, but he's certainly done his best to drag the Brewers to a victory now and again.
Madison Bumgarner - San Francisco Giants
The defending champion Giants have been primarily a disappointment this season. However, over the last few weeks, "MadBum" has helped the struggling Giants by posting a 3-1 record in 5 starts, pitching to a better 1.50 ERA. Bumgarner has been surprising consistent this season, keeping it up by holding opponents to a .161 batting average in 36.0 innings. He's struck out 33 and walked 9, leading the NL in ERA in July.
Clayton Kershaw - Los Angeles Dodgers
Calling him the second-coming of Sandy Koufax is nearly an understatement. Consistently near the top of the league in almost every pitching category, Kershaw has kept it up in superb fashion over the last 30 days. 4-1, 1.62 ERA in 5 games started; he's struck out 33 and walked just two in 39.0 innings pitched. He's held the opposition to a .158 average and a 0.59 WHIP, continuing to dominate with his explosive fastball and nasty curve. While Kershaw hasn't been the best in baseball lately, he's been the best in the National League, and will no doubt give everyone a run for their money when the actual Cy Young voting comes around.