Doolittle, a left-hander who had been with the A's longer than any other active player, owns an 0-1 mark with a 3.38 ERA in 21 1/3 innings this season. He's only allowed 12 hits and two walks, while striking out 31.
The right-handed Madson is 2-4 with a 2.06 ERA in 39 1/3 innings. He's struck out 39, while allowing just 25 hits and six walks.
Neuse and Luzardo were both among the Nationals' Top 10 prospects, according to MLB Pipeline. Neuse, a second-round pick in the 2016 MLB Draft, was ranked No. 6, while Luzardo, a third-round pick in 2016, was rated No.