As he refines arsenal, Nats' Mason Thompson could become bullpen mainstay
Briefly

Mason Thompson finished the season strong with 12 scoreless outings in his final 15 appearances.(Katherine Frey/The Washington Post)The Washington Nationals started their roster teardown at the 2021 trade deadline knowing that not every player they acquired would ultimately pan out.But the hope was a few would show promise and fit into the team's future.
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