Edwards, a three-time All-American, was mowing the lawn at his off-campus residence Wednesday in Boone, N.C., when the incident occurred. A teammate, Brian Quick, took Edwards to Watauga Medical Center, where the senior was treated and released.
Appalachian State spokesman Mike Flynn said medical privacy laws prevented the university from releasing details about the injury. But a person familiar with the incident said Edwards received stitches for a deep cut after the mower rolled down a steep hill back at him. However, the person said, Edwards does not have any injuries to bones or tendons.
"First of all, we're all fortunate and grateful that Armanti wasn't more seriously injured in this accident," Appalachian State coach Jerry Moore said.
"It's unfortunate for him because he has put a lot of energy into being a great leader on and off the field this summer ... But, as he's demonstrated many times, his toughness is second-to-none. So I'm confident that he'll be back on the field with his teammates as soon as possible."
Moore said that Edwards is scheduled to graduate in December, after just 3½ years.
Appalachian State is scheduled to start practice Friday, and the Mountaineers open their season Sept. 5 against East Carolina, leaving Edwards' start in jeopardy.
Two people familiar with former Michigan quarterback Justin Feagin said Feagin is planning to transfer to Appalachian State and would be able to play this season, pending determination of academic eligibility.
Edwards, 6-foot-1 and 180 pounds, has led Appalachian State to two Football Championship Series titles (formerly known as Division I-AA) in three years and last season won the Walter Payton Award as the top offensive player in the FCS.
Last year, he was 196-of-306 passing for 2,902 yards and threw 30 touchdowns, and rushed for 941 yards and 11 touchdowns.
Information from ESPN's Joe Schad was used in this report.