Uelmen was optioned to Triple-A Lehigh Valley on Saturday, Matt Gelb of The Athletic reports.
Uelmen joined the big-league roster Tuesday but spent less than a week with the team, exiting after making just one appearance. That outing didn't go well, as he allowed four runs (one earned) on two hits and two walks while striking out one in an inning of work against the Cubs on Saturday. Yunior Marte was recalled to take his place in the bullpen.