Rays @ Red Sox

I do not love laying -125 on a baseball under, so the starters have to earn it. In this Rays-Red Sox afternoon spot, that is where I keep landing. The total is 8.5, and nine runs feels like a real ask if the first half of this game looks anything like the recent starter form.

Jake Bennett Has a 0.94 WHIP

Jake Bennett is the Boston probable, and his 2026 line is the first reason I can get Under 8.5 involved. He is sitting on a 2.64 ERA with a 0.94 WHIP through 47.2 innings. The WHIP is the number I care about most here, because under tickets usually get wrecked when free baserunners pile up before one swing changes the game.

Griffin Jax Has Kept His Last Three MLB Starts Small

Griffin Jax is the Tampa Bay probable, and he does not need to be perfect for this number to work. His last three game log entries were five innings each with 1, 0, and 2 earned runs allowed. Give me that kind of five-inning start again and Boston has to do a lot of the damage later just to drag this over 8.5.

Bennett Is Giving Boston Real Length

This is not one clean Bennett start carrying the whole under case. His last three outings went 7.0 innings with 0 earned runs, 7.2 innings with 2 earned runs, and 6.1 innings with 1 earned run. That is 21 innings with only three earned runs allowed, which is exactly the kind of starter length I want when I am paying juice on an under.

The Offense Profile Does Not Force an Over

Tampa Bay’s season hitting line is .257 with a .334 OBP, .395 slugging, and .729 OPS. Boston is lower at .245, .314, .388, and .702 OPS. These are not dead offenses, but they are not so loud that I have to treat 8.5 like some automatic Fenway over.

The Doubleheader Setup Pushes Me Back to the Starters

This is the makeup of the May 9 postponed game and the first half of a split doubleheader, with another Rays-Red Sox game later at night. I am not pretending that tells me exactly who is available late, because it does not. It just makes me less interested in guessing relief usage and more interested in the cleaner part of the handicap: Bennett and Jax getting enough early outs.

The Weather Is Not Enough for Me to Chase Runs

The weather read has Fenway around 80 degrees at game time, no listed precipitation, and 14 mph wind. I respect that in this park. I just do not have a wind direction angle strong enough to throw out the starter case and flip this into an over.

The Counter Is Boston’s Heater

Boston is the scary side of this under. The Red Sox come in on a nine-game winning streak, and I am not hand-waving that away. If Jax only gives Tampa four clean innings instead of five, or if Boston keeps extending at-bats and making the bullpen work, this gets uncomfortable fast.

The Number Still Works at 8.5

At -125, I still want the under. Bennett brings the better full-season profile, Jax brings enough recent damage control, and neither offense forces me off the number. I need the starters to own the first half and avoid the one ugly late inning. Under 8.5, -125.