Jacko has been absent suffering with tendonitis in both knees, a frustrating period for the 19-year-old who made such an impact in the reserves last season. He made his comeback with a 20 minute substitute appearance last time out at Nottingham Forest, but was on from the start at Stevenage.
He managed to last 82 minutes of the 2-1 win and looked a little the worse for wear afterwards when asked how he was feeling.
"I can sum it up in one word, 'shattered', that will do," said the former England under-18 midfielder.
"They were desperate to get me off towards the end, they kept shouting over 'you alright?, you alright?'. I just wanted to play as long as I could, but I think they were right to bring me off in the end because my legs had just gone."
Jacko was certainly not pacing himself during the game, he patrolled the midfield with lots of energy and there does not appear to be too much wrong with his engine.
"I was getting about alright, I've been doing running more or less every day for the last few weeks so my fitness isn't too bad. It's just getting your legs back used to playing a game of football - that's the hard bit."
And he was happy to be back in central midfield with his old running mate John Piercy.
"Me and Piercy in the middle, yeah we play well together. We sort of know where each other is going to move, we're both decent passers of the ball so we can find each other so normally we work well together."
Being in the very early stages of his return, Jacko reports that he does suffer a reaction from his knees, but has been told it is part of the normal healing process.
"I've had aching around the knees but they say that is going to happen when you've been out. I've had a lot of stiffness around the muscles but it is natural when you've been out as long as I have and I've just got to keep an eye on it.
"I'm not worried about it. They say a couple of weeks and it will go when I get back playing and training every day. I'm looking at lots of stretching and just looking after my body basically."
Johnnie Jackson started his first game since the opening weeks of the season against Charlton and summed up how he was feeling in one word - shattered.