I'm not 100% certain that Santana will be up in September for the following reasons. One is that he hasn't hit to the level at CS that indicate he's even close to his 2017 form so with Counsell already juggling 4 regulars in the OF and with better defenders available in Broxton (assuming he's back) and Perez, who's bat has heated up, there's not much opportunity for Santana to see time other than the random PH spot, and even then they are deep enough that he's not the prime or even the second choice to hit. Secondly, he's arby eligible this winter. There's some question whether they will bring him back because, as of now going into 2018, he's no better than the 5th outfielder. Teams don't usually pay $2-3 million for a 5th outfielder. There's not much he can do to revive his trade value either by riding the big league bench in September.