Ricky Dimon recommended betting on the Arizona Diamondbacks moneyline against the Washington Nationals due to a clear pitching advantage and superior overall performance. Dimon highlighted the Nationals' slow start, losing their opening series to the Phillies and subsequently being swept by the Blue Jays, resulting in an overall 1-5 record. Washington's pitcher Jake Irvin was disappointing in his first two MLB seasons, posting uninspiring ERAs of 4.61 and 4.41, and recently struggled in his 2025 debut against Philadelphia, allowing 2 runs and 7 hits over just 5 innings. On the other hand, Diamondbacks starter Brandon Pfaadt impressed last weekend, delivering a quality start versus the Cubs with 3 earned runs over 6 innings, adding 5 strikeouts and just 1 walk. With Arizona viewed as a potential playoff threat and demonstrating promising early-season momentum, Dimon felt strongly about betting on the Diamondbacks in this matchup.