Keller made his debut in 2019, but established himself in the Pirates' rotation in 2022, posting a 3.91 ERA through 29 starts. He made the All-Star game in the following season, joining closer David Bednar as the only two Pirates to make the Midsummer Classic that season.

The San Diego Padres need a left fielder, but there's another position on the roster that is arguably just as, if not more dire, of a need. With the struggles of Martin Maldanado and Elias Diaz behind the plate, the Padres need to explore the catcher market.

The San Diego Padres are often among the teams most likely to be buyers at the MLB trade deadline. This year is looking to be more of the same, especially since they aren't up by much in the NL Wild Card race.