The Chicago White Sox have announced a deal with the Seattle Mariners for the hard-throwing reliever, Thyago Vieira, in exchange for international pool money.
Vieira was the eighth-ranked Mariners prospect according to MLBPipeline.com who they give him an 80-grade fastball on the scouting scale. Based on reports, his fastball sits between 97 to 100 mph and has reached 102 mph. His second pitch is a curveball that rates above average.
Splitting most of his time between AA and AAA, Vieira in 2017 pitched 54 innings with a 4.