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Watson had been battling plantar fasciitis all season, and it grew progressively worse toward the end of the season.
The procedure was a high energy shockwave that did not require an incision.
After averaging 23.6 minutes during the regular season, Watson's average went up to 27.5 in the playoffs after Derrick Rose tore his ACL.
Watson averaged 9.7 points and 4.1 assists during the regular season and 7.3 points and 5.5 assists in the playoffs, but his shooting percentage in the postseason was only 24 percent.
The Chicago Tribune first reported the procedures.
ESPNChicago.com's Nick Friedell contributed to this report.