Ryan Mattheus (chest) has yet to be cleared to resume throwing.
Ryan Mattheus said Tuesday that he's dealing with costochondritis, which is inflammation of a tendon in his chest.
Ryan Mattheus (chest) may be shut down for 1-2 weeks.
Ryan Mattheus has been shut down since last Tuesday due to an upper chest injury.
Nationals recalled RHP Ryan Mattheus from Triple-A Syracuse.
Nationals optioned RHP Ryan Mattheus to Triple-A Syracuse.
Nationals activated RHP Ryan Mattheus from the 15-day disabled list.
Ryan Mattheus (hand) is shifting his minor league rehab assignment to Triple-A Syracuse.
Ryan Mattheus (hand) will move his rehab assignment Tuesday to Double-A Harrisburg.
Ryan Mattheus (hand) will begin a rehab assignment with the Gulf Coast League Nationals on Friday.
Ryan Mattheus threw off a mound Friday for the first time since he broke his hand in May.
Ryan Mattheus is scheduled to throw off a mound Friday for the first time since he broke his hand in May.
Ryan Mattheus (hand) has thrown from a distance of 60 feet each of the past two days.
Ryan Mattheus (hand) played catch on Thursday for about 10 minutes.