Austin arrived at St Mary's in January 2016, ending a three-year stay at Queens Park Rangers, and scored on his debut in the 1-0 victory over Manchester United.
However, the 28-year-old was struck down by hamstring and knee injures across March and April, resulting in him making just seven Premier League appearances in total.
The Englishman did return refreshed for the 2016/17 campaign and he was in good form heading to the turn of the year, having scored six goals from 13 league matches.
But, the injury curse struck again, and he dislocated his shoulder in December's Europa League clash with Hapoel Be'er Sheva, ruling him out of action for almost all of the remainder of the season.
Austin, who did make two cameo appearances towards the end, is now fully fit after recovering from the problem and he admits his experience in the game helped him get past the latest setback.
"I was doing really well and had nine goals before the start of December," he told The Big Issue. "I couldn't have really asked for much more. Then I obviously got the injury and it was frustrating because it was just a freak injury, really, so I had to knuckle down.
"Any injury as a professional footballer is not good. But with me being older and having the injury before, that definitely helped me in dealing with it."