After an injury-shortened 2018, Jason Castro is on track to be ready to participate in the Twins' 2019 campaign, including Spring Training according to Dan Hayes of The Atlantic (subscription required). Castro tore the meniscus in his right knee early in the 2018 season in which he played only 19 games with a line of .143/.257/.238. At first the Twins thought it would be a short-term issue, but later found it to be season-ending. Castro has been rehabbing throughout the remainder of the season and off-season and looks to be "full-go" according to Derek Falvey, the Twins' Chief Baseball Officer.
With Castro out, this allowed more playing time for Mitch Garver and fan-favorite Willians Astudillo, along with MLB journeyman catcher Bobby Wilson. Certainly the playing time for both Garver and Astudillo provided some great experience and has put the Twins' front office at ease with having a veteran catcher in Castro along with the younger Garver and Astudillo. In Hayes' article, he quotes Falvey: "[Garver and Astudillo] got a ton of experience, which will help them immensely moving forward. We feel like we have three guys we feel good about for different reasons."
Garver (102 games, .268/.335/.414) is assumed to be the platoon or back-up to Castro while Astudillo (29 games, .355/.371/.516) may fight his way for a bench spot as a super-utility player -- in addition to catching, Astudillo has seen time at second and third base this past season, along with a game or two in the outfield. He was also the DH for three games in 2018 and had a pitching appearance.