However, unlike midfield additions Glen Kamara and Steven Davis, the USA international has barely been involved since.
A lot of that has to do with having the same position as Rangers’ influential captain. James Tavernier played 57 of Rangers’ 60 matches last season and has been a near ever-present during the early stages of this campaign, too.
It seems Polster doesn’t have enough to genuinely challenge Tav, and so, has made just two competitive appearances for the Gers to date.
Incessant speculation over the captain’s future [90min.com], may have the ex-MLS star hopeful that the right-back spot could still be his down the line.
It’s suggested that the 25-year-old is looking for a move to Europe to further his international ambitions, having been an unused substitute in two Argentina friendlies back in September.
If Stevie G did manage to lure Di Placido to Ibrox, whether as a replacement for the skipper or as competition, it would surely spell trouble for Polster.
Let’s not forget that Jon Flanagan is also a natural right-back. Right now, if Tav missed an important league clash, the Scouser would be more likely to fill the void than the American, with Andy Halliday or Borna Barisic playing left-back.
Polster has two years left on his Ibrox deal, so there is still time to turn his fortunes around.
Yet, as the current third choice right-back, with the club reportedly interested in another, things look a little bleak.