The tentative agreement comes hours ahead of Thursday's 8:59 p.m. PDT deadline to add players into the organization who can be eligible for the postseason. Though he has homered 21 times, Pujols is hitting only.232 with a.665 OPS.
The Angels are sending the Tigers right-handed pitcher Grayson Long, who had been one of their most improved prospects this season.
For the deal to complete, Upton needs to clear medicals. He posted a 2.69 ERA in 26 starts this season, with 125 strikeouts in 133 2/3 innings. After the Tigers signed him to a six-year, $133 million deal back in January 2016, Upton went on to slash just.246/.310/.465 during his first season in the "Motor City". His position? Left field. The Angels also will reportedly receive cash to cover part of Upton's 2017 salary.
He's due $21.125 million annually through 2021, although his contract includes an opt-out clause after this season.
The Angels, 69-65, are one game out of the A.L. Wild Card.