UPDATE: The Marlins' worst fears have been realized. The club has placed Giancarlo Stanton on the 15-day DL with a right hamstring strain, reports Joe Frisaro of MLB.com.
Marcell Ozuna has been called up from Double-A to take Stanton's place, and will make his MLB debut on Tuesday.
Not to be left out, infielder Joe Mahoney was also placed on the disabled list Monday with a right hamstring strain on Monday. Left-hander Brand Hand was recalled from Triple-A to take his roster spot.
Stanton appeared to injure his leg while running down to first base. Stanton pulled up lame after hustling down to first base on a groundball. Stanton grabbed his right hamstring, then started to hop on his left foot while wincing in pain before collapsing on the ground. Stanton was able to leave the game under his own power.
Stanton is the most well-known and important player on the Marlins team after they traded off most of their other recognizable and expensive players this winter. The right-fielder started the season slowly, but had begun to hit the ball well recently. He is hitting .227/.341/.387 on the season with three home runs and nine RBI's.