James Wagner of the Washington Post reports that the Nationals were one of the teams in attendance at Ryan Madson's throwing session Friday.
Hyun-Jin Ryu (shoulder, groin) threw four scoreless innings Wednesday for Triple-A Oklahoma City.
Christian Yelich (back) remains out of the Marlins' starting lineup on Wednesday in Tampa Bay.
Giancarlo Stanton is not in the Marlins' lineup Wednesday.
Denard Span is getting a normal day of rest Wednesday.
Blue Jays activated 2B Devon Travis from the 15-day disabled list.
Wil Myers (forearm) is out again Wednesday.
Asdrubal Cabrera is day-to-day with back spasms.
Hunter Pence (hamstring) remains absent from the Giants' starting lineup on Wednesday afternoon.
Buster Posey is not in the Giants' starting lineup on Wednesday afternoon against the Padres.
Athletics activated 2B Jed Lowrie from the 15-day disabled list.
Matt Carpenter is out of the Cardinals' lineup Wednesday because his wife is about to have a baby.