The Boston Red Sox look to gain ground in the AL East race during their three-game set against the Arizona Diamondbacks beginning on Friday.
The pregame narrative: Boston is 3.5 games back of the Toronto Blue Jays, who are in New York for a pivotal series against the Yankees. The Red Sox, now without Roman Anthony, are a slight favourite with rookie Payton Tolle going opposite Eduardo Rodriguez.
Check out my Red Sox vs. Diamondbacks SGP predictions for Sept. 5, featuring Tolle and Rob Refsnyder.
Red Sox vs. Diamondbacks predictions
Parlay: Red Sox F5 +0.5 | Tolle over 4.5 Ks | Refsnyder 1+ RBI (+450)
Red Sox F5 +0.5 (-162): I want to tap into what I perceive to be a pitching advantage in Boston’s favour.
Tolle has only made one MLB start, and it was solid. He fanned eight Pittsburgh Pirates over 5.1 innings of two-run ball. I’ll circle back on the rookie later, but believe he’s due for another strong outing.
Rodriguez, meanwhile, has a massive MLB sample, and it’s ugly.
The southpaw owns a 5.40 ERA this season and has gotten routinely shelved at Chase Field, MLB’s third-most hitter-friendly environment, according to Baseball Savant’s Park Factors.
Boston’s active lineup has a successful history against Rodriguez over a large sample, too.
The Sox are a collective 22-for-67 against him with a .612 slugging percentage. I expect them to be at least tied through five frames.
MLB SGP legs
Tolle over 4.5 Ks (-152): Back to the 6-foot-6, moustachioed 22-year-old southpaw.
Tolle was torching the minor leagues before joining the Sox. He had a 3.04 ERA with a blistering 13.1 K/9 rate in 18 starts this year.
The Texas Christian product has an upper-90s fastball/cutter combo and a 99th percentile “extension,” which essentially measures how far from the rubber he releases his pitches.
That makes his offerings appear even faster for opposing bats.
Arizona is a tough team to put away on strikes, especially for lefties, but Tolle has generated great swing-and-miss at every level and will have the advantage of seeing this lineup for the first time.
Refsnyder 1+ RBI (+170): Refsnyder only has 23 RBI on the season, but this is oozing with value.
He’s slated to hit fifth for Boston tonight, according to Rotowire, behind names like Alex Bregman and Trevor Story.
That duo has reached base safely in a combined 18-of-42 plate appearances against Rodriguez (.428 OBP). Refsnyder is just 2-for-10 against the lefty, but he has a .392 xBA in those at-bats, so I expect some positive regression.
And on the season, Refsnyder has demolished left-handed pitching to the tune of a .304/.395/.559 slash line.
This is a great price for a player in a run-producing spot.
Red Sox vs. Diamondbacks predictions made at 11:26 a.m. ET on 09/05/2025.
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