Washington Nationals closer Sean Doolittle (foot) threw off flat ground without a boot on Wednesday and was encouraged with how he felt. However, he is aware that he cannot rush himself back. Doolittle was one of the best closers in baseball before his injury, sporting a 1.45 ERA, 0.54 WHIP, 11.8 K/9 and 22 saves. He should remain stashed in all leagues, but his return isn't imminent. [...]