What happened: The Seattle Mariners have arrived at Oriole Park at Camden Yards to begin a four-game series in Baltimore. Ahead of the opener, the team placed shortstop J.P. Crawford on the 10-day injured list with a right hand contusion, recalling infielder Ryan Bliss to the active roster.

Why it matters: Losing Crawford is a significant blow to Seattle as they cling to a 1.5-game lead in the AL West while facing the Baltimore Orioles. Crawford was hitting .228 with 10 home runs prior to the injury, which occurred after he was hit by a pitch on June 5.

What to watch: Emerson Hancock takes the mound at 6:35 PM ET tonight. Rookie Colt Emerson is expected to handle the majority of shortstop duties during Crawford's absence.