The Pacers announced Sumner underwent successful surgery Monday to address a torn left Achilles' tendon.

Sumner sustained the injury in a workout last week, and though surgery went according to plan, he'll likely miss most -- if not all -- of the 2021-22 season while he goes through a lengthy and arduous rehab. The 25-year-old has now suffered two major left leg injuries through his first five NBA seasons; he was limited to just one appearance as a rookie in 2017-18 while he recovered from an ACL tear suffered in January of his final collegiate season at Xavier.

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