The Pittsburgh Pirates return to PNC Park on Monday, July 27, for a 6:40 PM ET clash with the Arizona Diamondbacks. Mitch Keller gets the ball for Pittsburgh, squaring off against veteran right-hander Merrill Kelly in what shapes up as a quality pitching matchup on the North Shore. With the dog days of summer in full swing, every game in the second half carries real weight for a Pirates club looking to establish itself in the National League. This one is worth watching closely.

Pitching Matchup: Mitch Keller vs. Merrill Kelly

Keller is the undisputed anchor of the Pirates rotation. He has developed into one of the more reliable starters in the National League, and his ability to work deep into games is something Pittsburgh leans on heavily. Keller's stuff — primarily his cutter and curveball — gives opposing lineups problems, and his performance tonight will set the tone for the entire game.

On the other side, Merrill Kelly is a seasoned arm for Arizona who attacks the strike zone consistently. Kelly does not overpower hitters but keeps the ball in play and forces weak contact. Pittsburgh's lineup will need to be patient and work counts to get into the Arizona bullpen early.

Pittsburgh Pirates Starting Lineup

• 1. Jake Mangum — CF
• 2. Brandon Lowe — 2B
• 3. Bryan Reynolds — LF
• 4. Esmerlyn Valdez — RF
• 5. Ryan O'Hearn — DH
• 6. Nick Gonzales — 3B
• 7. Jacob Gonzalez — SS
• 8. Tyler Callihan — 1B
• 9. Henry Davis — C

Keys to Watch

Bryan Reynolds in the Heart of the Order

Reynolds hitting third puts him in the middle of any productive inning Pittsburgh strings together. If Mangum and Lowe can get on base at the top, Reynolds has the bat to do real damage. His at-bats against Kelly will be among the most important of the night.

Esmerlyn Valdez Batting Cleanup

Slotting Valdez fourth is a statement of confidence. The right fielder carries the run-production burden in this lineup construction, and how he handles Kelly's strike-zone work will go a long way toward determining whether Pittsburgh puts up crooked numbers.

Henry Davis Behind the Plate

Davis batting ninth keeps him in a lineup spot where he can function as a second table-setter. His ability to get on base ahead of Mangum creates a potentially dangerous top-of-order loop. Defensively, his game-calling partnership with Keller matters just as much.

Nick Gonzales and Jacob Gonzalez in the Six and Seven Spots

The middle-to-lower portion of this order features two young infielders who need to contribute situationally. If either Gonzales can come through with runners on base against Kelly, Pittsburgh has a chance to build a multi-run lead and let Keller work with a cushion.

Prediction

This has the feel of a low-scoring game. Keller and Kelly are both the type of starters who can suppress offenses for six-plus innings, so do not expect a high-run affair. Pittsburgh has the home-field advantage at PNC Park and Keller on the mound — two factors that favor the Bucs. Look for Pittsburgh to scratch out enough offensively, particularly through Reynolds and Valdez, to come away with a 3-2 win in what should be a tightly contested game from first pitch to last out.

Catch the action on SportsNet Pittsburgh on TV or Sports Radio 93.7 KDKA The Fan on the radio. First pitch is set for 6:40 PM ET.