The NHL said its investigation into the matter found no evidence that Pinto, whose suspension amounts to half of a regular season, made any bets on NHL games.
"The NHL considers this matter closed, absent the emergence of new information, and will have no further comment," the NHL said in a statement.
Pinto, who the Senators selected with the 32nd pick of the 2019 NHL Draft, is a restricted free agent and has not played for Ottawa this season.
Pinto had 20 goals and 35 points in 82 games with Ottawa during the 2022-23 season, which marked the American's first full campaign in the NHL.