SAN DIEGO -- The newest member of the Phillies joined the club in San Diego on Saturday. Justin Bour arrived in the visiting locker room at Petco Park clad in red and grey, a stark difference from the Marlins uniform he donned less than 48 hours ago.
A corresponding move had to transpire to make room for Bour on the 25-man roster. The Phillies optioned starting pitcher Zach Eflin to Triple-A, a rather surprising move, given Eflin's success in the rotation this season and the Phillies' season-long practice of carrying 13 pitchers.
With a doubleheader scheduled against the Mets next week, manager Gabe Kapler said it's likely Eflin won't miss his next start. Teams are permitted to carry 26 players on doubleheader days, so Eflin could be recalled to start one of the games.
Kapler called the move an opportunity to increase a "marginal advantage" in the National League East. Going into Saturday, the Phillies were tied with the Braves for the division lead.
"We made the decision with the understanding that it's possible [Eflin] continues to make all of his starts for us," Kapler said. "Right now, we have to believe that the division is going to come down to one game. If that's true, having an additional player on our roster that we can use right now is that marginal edge."
There was speculation that the player to be optioned would be J.P. Crawford or Scott Kingery. 
"[Eflin's] a professional through and through," Kapler said. "He understands that we're going to try and get every marginal advantage through the end of the season that we possibly can. Sometimes, one guy takes it on the chin so that 25 guys, as a group and as an organization, can prosper."
Worth noting 
• Bour was not in the starting lineup against the Padres on Saturday. He will primarily serve as a left-handed power hitter off the bench, with Carlos Santana expected to see the bulk of time at first base. It's a new role for Bour, who had been the Marlins' starting first baseman since 2015. 

"[The Phillies] have been great with communicating, letting me know things ahead of time, where my role is, and stuff like that," Bour said. "But for me, all I want to do is come and help the team win. ... You play the game of baseball for these last couple months, when you're making a playoff push and you're playing meaningful games. It's definitely a change of pace I'm very much looking forward to."
• Wilson Ramos was to begin his rehab assignment in Class A Advanced Clearwater on Saturday. Kapler said the plan was for Ramos to play five innings Saturday and serve as the designated hitter Sunday, before getting a day off to be evaluated.
"From a results standpoint, we just want to see him healthy," Kapler said. "One of the ways to get there is making sure he has the reps under his belt, get a little timing and rhythm at the plate, and then he's ready to roll."
Ramos has been on the disabled list since July 18 with a left hamstring strain. He has yet to play a game with the Phillies since being acquired from Tampa Bay at the non-waiver Trade Deadline.