The former Hawk was enjoying career-best form with his new club in the first four rounds, booting nine goals as a small forward before suffering a strained quad against North Melbourne.
An expected four-week layoff stretched out to seven rounds as McGlynn, who missed most of the 2008 season with a quad complaint, sought to ensure that he was fully fit before returning.
Speaking before the Swans trained at the SCG on Thursday night, McGlynn admitted he was disappointed to be struck down with injury while in such outstanding form.
"You're at a new club and you want to make your mark. I was doing that and then I got struck down by the quad," he said.
"It was a little bit frustrating but that's footy. You cop your injuries and you've just got to deal with it. It's a long season. We've got one game before the break and hopefully I can have a solid second half to the year."
With his latest injury on the opposite leg to that which ruined his 2008 campaign, McGlynn said it was unlikely that his history of quad strains was due to any biomechanical or physical problem.
"I'd like to think it's just bad luck," he said.
"The game's getting a lot faster now and it's at a higher intensity. Maybe my recovery wasn't as good that week or I just had a little niggle.
"It comes down to a lot of things but you can't put a finger on it. You've just got to cop the injury and go out and do the best you can next time you get to play."
Despite missing a third of the season, the 24-year-old said the move north had already paid off with his renewed enthusiasm for the game.
"It was due to coming up here with a different mindset and I was a lot happier playing footy," he said.
"Although I played some good footy with Hawthorn, I think that was probably the best footy that I know I can play and hopefully I can deliver that for the Swans in the coming years."
However, McGlynn cautioned fans not to expect a repeat of his most recent performance at AAMI Stadium when he booted five goals in the Swans' demolition of Adelaide in round two.
"I'd like to just slot back in, but obviously you've got to be playing a lot of footy to keep in form," he said.
"Hopefully I can get back to [that] form in the next couple of weeks but I don't think there's any pressure on me to come in and perform straight away. I just want to come in and do my little bit for the side and hopefully we can get a win."
