Thompson will join the Phillies in spring training this year, CSN Philly's Jim Salisbury reports.
The big right-hander, who turns 22 at the end of January, is with his third organization in two years after coming over from Texas in the Cole Hamels trade. His plus slider and mid-90s fastball will allow him to be good for about a strikeout per inning in his peak years, but he will probably settle in with a WHIP north of 1.25 and an ERA in the 3.50-4.00 range, at least in his first few seasons in the big leagues. He has done all he can at Double-A and should head to Triple-A to start the year. Look for him to debut in Philadelphia sometime this summer.