Otto Greule Jr/Getty Images
Just like Street, Ryan Cook is a thriving reliever on a struggling team.
Cook has a 1.46 ERA and eight saves. His ERA would be a lot lower, but he was rocked by the Giants in one outing. However, Cook is very consistent and would definitely help the Nationals' bullpen.
This year, Cook has pitched 37 innings and allowed just six earned runs. Cook has walked 21 batters, but he has only allowed 13 hits. He has a phenomenal 0.92 WHIP, and he could definitely close until Storen gets back.
Or, he could be the guy who comes on with two outs and runners on base to get the final out of the inning and strand the runners.
Again; Washington wouldn't get Cook and Street. However, adding Street would help the Nationals have a shutdown closer for the postseason, and adding Cook would help the Nationals add another shutdown reliever who can help the team in many ways.
Oakland is in a tough division and has a very small chance of making the playoffs. They would be looking to upgrade their farm system, so Washington would have to trade prospects. However, since the Nats have a great farm system, they could definitely work out a trade.