Only six players went the whole distance in the 2016/17 Bundesliga season, with Oliver Baumann, Ralf Fährmann, Rune Jarstein, Bernd Leno, Alexander Schwolow and Yann Sommer playing every minute for their clubs.

Click here to download the free, official Bundesliga app!

What do they all have in common? They are all goalkeepers. That was easy, but not as easy as it is to hear every Leno save as one man did last season.

Gerhard Stoll did not miss a second of Bayer Leverkusen's Bundesliga fixtures in 2016/17 – home or away. He was there for all of Leno's performances, whether from his habitual pew in the South Stand of the BayArena, or down in Munich's Allianz Arena.

Stoll followed his team the length and breadth of Germany, yet there is something intriguing about the 49-year-old from just south of Cologne: he has been blind since the age of 13.

Watch: Chicharito's top five goals of 2016/17

He did not see any of Leno's save, but he still knew everything about them; Javier 'Chicharito' Hernandez's heroics were depicted only in words, but Stoll is able to catch the gist. "When I'm in the stadium, I always have this film running within me," Stoll said. "It's like a film from the 70s or 80s; a film from the time when I could still see."

Born in Cologne, Stoll followed Fortuna Cologne up and down the country as he caught the football bug at a young age. After losing his sight, he switched his allegiance upon learning of Leverkusen's innovative provision of live reporting for blind supporters inside the stadium in the 1999/2000 season.

To this day, Stoll has not only benefitted from the service, but he has also played an active role in improving it for fellow fans. Since 1999, he has belonged to a nationwide association that has ensured that almost every Bundesliga and Bundesliga 2 club now offer a similar service.

Stoll has been influential in ensuring blind fans can hear running commentary at most Bundesliga games.

A regular at talks on the issue, also on invitation of the DFL Deutsche Fußball Liga, Stoll knows how football should be presented to those who cannot see the action. "Football is like a book and every pass, every free-kick, every corner and every goal kick is a sentence within this book – that is what needs to be narrated," he said. "I would like it to be narrated as it is."

Thanks to his own endeavours, Stoll can now travel the country, following every kick, corner and pass of Leverkusen's games away as well as at home – and last season, he took full advantage.

For the first time, he managed to attend every single one of his team's games after another life-changing moment told him that was his new objective. After waking from an operation on his heart, the first thing Stoll asked his doctor was how Leverkusen had done in the first round of the DFB Cup against FK Pirmasens. "When you've been through all of this, then you must do something crazy," thought Stoll, who got to work planning his movements.

All Stoll needs for away games is a friend to accompany him - he plans the rest himself.

With his BayArena season ticket in his hand, and a handy bus and rail journey to the stadium from his home, that effectively left only the other 17 fixtures to arrange, and planning is something Stoll likes almost as much as getting to the stadium.

"All my accompanying person needs to do is meet me at the given place at the given time, and then we follow the journey I have planned," said Stoll, who works for Cologne's district council. The fixture list helped, with only three overnight stays required – in Munich, Augsburg and Hamburg – and the other two evening away games in Cologne and Darmstadt – both venues he could return home from after the final whistle.

No matter what obstacles were thrown his way, what with trains delayed due to problems with power lines or animals on the line, Stoll still did not miss a second of the action in the stadium, even if the trip to Leipzig on Matchday 28 almost ruined everything just six games from the end of his remarkable adventure.

A delay meant he made his connection by miracle, getting the last train to Leipzig in time for kick-off, and confirming to him that – this year – it was going to happen.

'Sir Gerhard' has plenty of memories following Die Werkself the length and breadth of Germany.

Aside from the logistical headaches, it was not a particularly easy ride in the stadium either. "When we went 1-0 down late on, I started to panic; my heart started racing," said Stoll of their 1-1 draw at Ingolstadt at the start of May. "I see being a fan as a matter of honour: when things are going well, you've got to be steadfast in showing your colours, but when things are not going well, you have still got to remain part of it – people like that are the true fans. It would have been easy for me, after Matchday 28 or 29, to just say enough is enough, given how bad things were, but it's not in my nature to do that."

Instead, 'Sir Gerhard', as Stoll has become known thanks to his extravagant and rather British style, brought up the full house of 34 with an afternoon he will not forget in Berlin's Olympiastadion. Six times he was ripped from his seat to celebrate as Bayer emerged 6-2 victors against Hertha. "I'm just exhausted," he said after. "I'm delighted that it's all over and now I can get a few days' rest."

That rest can continue until June 29, when the DFL announce the 2017/18 fixtures. From that moment, you can count on 'Sir Gerhard' getting his paper and pen out, planning how he can do it all again. Stoll, who in September will offer a meal to all those who accompanied him over the season, cannot wait for the next crazy tour to commence.

ALL NEW: Can you recognise these Bundesliga venues? Take part in our quiz below!

Click here for more Leverkusen news!