Walker (ankle) was traded to the Diamondbacks as part of a five-player trade Wednesday night.
Walker has shown some promise in the past, but has struggled to put it all together in the last couple seasons. The 24-year-old hurler posted a 4.22 ERA and 4.99 FIP over 134.1 innings last season and struggled to keep the ball in the yard (1.81 HR/9). The move from Seattle to Arizona will only exacerbate those concerns, so the youngster will likely need to up his groundball rate to enjoy success. He's under team control for at least another four seasons, providing some time for him to develop with the Diamondbacks.