SoxProspects writes of Bryan Mata: "Projects as a back end starter, but could end up in the bullpen where his stuff would tick up and play in a late inning relief role."
https://soxprospects.com/players/mata-bryan.htm
... while MLB Prospect Watch writes of Mata: "He has the upside of a mid-rotation starter but will have to develop much more consistency to get there."
http://m.mlb.com/prospects/2019/?list=bos