The Arizona Diamondbacks (13–19) look to salvage the series finale against the Chicago Cubs (16–16) on Sunday, May 3, 2026, at Wrigley Field. Following a hard-fought pair of losses on Friday and Saturday, Arizona is struggling to find momentum as they wrap up their Chicago road trip. This matchup features two veteran pitchers hoping to rebound from difficult stretches in an early-season battle for divisional relevance.

The Pitching Breakdown

Merrill Kelly (AZ): Merrill Kelly, affectionately known as “Mert,” enters this start following a rocky month. Through three outings, he carries a 1–2 record with a significant 9.20 ERA and 2.25 WHIP. His last performance on April 28 against the Brewers was particularly challenging; Kelly lasted just five innings, allowing five earned runs while struggling with his command, as evidenced by a season-high five walks. The primary concern for Arizona has been Kelly’s susceptibility to the big inning, having surrendered 10 hits in a previous start against the White Sox. To find success on Sunday, Kelly must rediscover the precision of his sinker and limit the free passes that have plagued his 14.2 innings of work this year.

Matthew Boyd (CHC): The Cubs counter with Matthew Boyd, a left-hander who has shown flashes of his trademark strikeout ability but has also dealt with consistency issues. Boyd enters the series finale with a 1–1 record and a 7.00 ERA. While his run prevention numbers are high, his underlying metrics suggest a higher ceiling; he has already racked up 26 strikeouts this season. In his most recent start on April 27 against the Padres, Boyd struck out four over four innings but surrendered five earned runs. Unlike Kelly, Boyd relies on power and swing-and-miss stuff, but like his counterpart, he has struggled to limit damage once runners are on base. For the Cubs to secure the sweep, Boyd will need to leverage the friendly confines of Wrigley and stay ahead of the Diamondbacks’ hitters.

---

Strategic Best Bets

1. Chicago Cubs Moneyline (-130) The Cubs are the tactical choice to complete the sweep. While both starters have bloated ERAs, Matthew Boyd’s ability to generate strikeouts (26 SO compared to Kelly’s 9 SO) gives the home team a higher floor. Furthermore, the Cubs’ offense has been efficient at home, winning the first two games of this series with timely hitting. Given Kelly’s current command struggles—yielding 12 walks in just under 15 innings—the disciplined Chicago lineup is likely to capitalize on early-inning baserunners.

2. Over 9.5 Total Runs (-115) With two starting pitchers currently carrying ERAs over 7.00, a high-scoring affair is the most probable trajectory. Both Kelly and Boyd have been vulnerable to the long ball and “crooked numbers” early in games. Wrigley Field often rewards fly-ball hitters, and with both bullpens seeing significant action this weekend, expect a back-and-forth slugfest that clears the 9.5-run threshold.

3. Matthew Boyd Over 5.5 Strikeouts (-110) Despite his 7.00 ERA, Boyd remains a “K-per-inning” pitcher. He has maintained a healthy strikeout rate throughout the spring and faces an Arizona lineup that has shown vulnerability to left-handed sliders. As long as Boyd avoids an early exit, his ability to miss bats should carry him past this total.

---

The Sharp Edge: Keep an eye on Ketel Marte. The Diamondbacks’ veteran has a history of performing well against left-handed pitchers like Boyd. If Boyd struggles with his slider location, Marte is the prime candidate for an “Over 1.5 Total Bases” prop win.