Tonight's performance notwithstanding, I think Eovaldi has value.
I thought about this a bit. What kind of package would Eovaldi get?
He has a 6.0 fWAR over the last year and a half, mostly concentrated in last year's excellent (and slightly lucky) performance. There's no real stuff deterioration and the pinpoint control is still there, resulting in few baserunners. But he's had a bad slider in many games, and batters have teed off on it year, resulting in a bloated 2.15 HR/9.
Still, he's been mostly good. Only 2 of his 14 starts have been duds -- the most recent one post-ASB and the dreadful 5/17 game against Houston (5 home runs in 1.2 IP).
Here are some recent deals for rental starting pitchers (and their fWAR over preceding 1.5 seasons) over the last half decade:
2021
Kyle Gibson (2.0 fWAR*), Ian Kennedy and Hans Crouse to Phillies for SP Spencer Howard (50, #33 overall)
Jose Berrios (3.5 fWAR*) to Blue Jays for SS/CF Austin Martin (50, #44 overall) + SP Simeon Woods Richardson (45, #72 overall)
Tyler Anderson (2.1 fWAR*) to Mariners for C Carter Bins (40) + SP Joaquin Tejada (40)
*includes shortened 2020 season
2019
Marcus Stroman (4.9 fWAR) to Mets for SP Anthony Kay (45) and Simeon Woods Richardson (45+)
2018
Kevin Gausman (4.1 fWAR) + Darren O'Day to Braves for RP Evan Phillips (40), 3B Jean Carlos Encarnacion (40+), C Brett Cumberland (45+), SP Bruce Zimmerman (35+), international spending
Lance Lynn (1.9 fWAR) to Yankees for INF Tyler Austin (40) and SP Luis Rijo (40)
J.A. Happ (4.9 fWAR) to Yankees for INF Brandon Drury (45+) and OF Billy McKinney (40+)
Nathan Eovaldi (0.7 fWAR) to Red Sox for SP/RP Jalen Beeks (45)
2017
Yu Darvish (5.5 fWAR) to Dodgers for Willie Calhoun (#89 overall prospect)
2016
Wade Miley (3.5 fWAR) to Orioles for Ariel Miranda
Andrew Cashner (1.9 fWAR) to Marlins for 1B/OF Josh Naylor, SP Jarred Cosart, RP Carter Capps
That's a pretty wide range. Eovaldi’s 2021 was immensely valuable, arguably the most among SPs in the AL. His age (32) and injury history would put him below Berrios, probably. But maybe something in the range of Darvish (similar injury history, so-so) final year), Gibson and Stroman could be comps here?
O’Hoppe and Painter on the Phillies have been discussed. Would Eovaldi be enough to get, say, Royce Lewis (#62 per Fangraphs, and out for the year)? Looking at teams like the Phillies, Twins, Dodgers, Mets, Cardinals, etc. The problem is, I’m sure no one is in on Eovaldi until Soto, Castillo, Mahle and Montas are settled.