McArthur allowed a run on two hits and struck out three without walking a batter over 1.1 innings to earn the save in Tuesday's 4-2 win over the Mariners.
McArthur (1-1) blew a save and picked up the loss after he pitched two innings, surrendering two runs (one earned) on four hits while striking out three batters in Sunday's 3-2 extra-inning defeat to the Rangers.
McArthur allowed one hit and one walk over two scoreless innings to earn a save Tuesday versus the Blue Jays.
McArthur earned the save in Wednesday's opening game against the White Sox, allowing one hit while recording a strikeout in a scoreless ninth inning.
McArthur secured his second save of the season Sunday against the White Sox. He pitched a scoreless ninth, allowing a walk and a hit while striking out two.
McArthur has allowed a run on three hits, a walk and a hit batsman while striking out two over three Cactus League innings.
McArthur picked up the save in Monday's 6-4 victory over the Guardians. He pitched a clean inning and struck out one.
McArthur (1-0) struck out two over 1.1 perfect innings to earn the win Saturday over the Astros.
Kansas City recalled McArthur from Triple-A Omaha on Friday.
McArthur was optioned to Triple-A Omaha on Thursday.