Rosario had a 782 OPS in August. I think missing out on 2020 really hurt a lot of these guys. He's a career 700 OPS guys so it's not like he has a huge ceiling.
Potts has taken a step backwards, but was injured at the start of the season and is still only 22.
German has been taken out of the pen. His last two appearances have been in relief: 2 innings, 4k, 0h, 0bb, 0r. (SoxProspects had him projected as a middle reliever anyway.)
Wallace had only played short season ball before this year and missed out last year. In August: 0.92 WHIP. He has 20 k's in his last 11 innings to only 4 bb's.