4:00pm: Rodriguez tweets that the Marlins will designate veteran infielder Mike Lamb for assignment to make room for Stanton. Lamb's DFA is unsurprising, as the 34-year-old posted a line of just .208/.269/.250 through 26 plate appearances.
3:39pm: Clark Spencer of the Miami Herald tweets that Stanton will join the Marlins for the series opener in Philadelphia on Tuesday this week.
1:46pm: MLB.com's Joe Frisaro echoes (via Twitter) that Stanton is not in the lineup and says that there is a report out that he's been called up by the Marlins.
As Rodriguez cautions, it's possible that Stanton is just receiving a scheduled day off, however this news certainly meshes with the previous reports and speculation that Stanton may be on his way to Miami to continue his 2010 reign of terror in the National League East.
The 20-year-old righty slugger has shown tremendous improvement over last year and absolutely annihilated Double-A so far this season. His .311 batting average entering Sunday matches his on-base percentage from Jacksonville in 2009; his .441 OBP and .726 slugging percentage for the season are also each well over 100 points higher than his marks from '09. To date, he's mashed 21 home runs and walked 44 times in 238 plate appearances, versus 53 strikeouts.