There was nothing the mercurial Brennan could not do on the football field, that is except do any of his brilliant feats consistently.
Brennan began his AFL career with the Brisbane Lions in 2003 and over the next decade showed that he could jump higher than anybody in the league, run faster than anybody when he wanted to and kick goals from anywhere unlike anyone else was capable of.
While he could do all of those things seemingly on a whim, he never was able to produce his brilliant form consistently and the result was that both the Brisbane Lions and Gold Coast Suns felt they had one of the great AFL talents on their list, but never could quite fully capitalise on his ability.
The 29-year-old has now made the decision that the 2013 season with the Suns will be his last in the AFL with Brennan making the decision to retire in order to focus on his career outside of football, and to spend more time with his young family.
After growing up in Darwin and captaining the Northern Territory at the 2001 National Championships, Brennan was drafted by the Brisbane Lions in the 2002 National Draft and made his AFL debut with the club in their third straight premiership year of 2003.
He wasn’t able to cement his spot in the premiership team for the grand final win over Collingwood or indeed in the losing grand final of 2004 against Port Adelaide, but by 2006 he had become a regular member of the Lions side and one of the most exciting talents in the AFL.
His career-best season came in 2008 when he appeared finally on track to realise his full potential and when he signed with the Gold Coast Suns for their inaugural season in 2011, he was one of the club's top recruits along with Gary Ablett, Jarrod Harbrow, Michael Rischitelli and Campbell Brown.
However, he only added a further 54 games over the last three years with the Suns to go with his 119 matches with the Lions and his time with Gold Coast saw him revert back to being his frustratingly inconsistent best.
He continued to show some of the brilliance that made him such a prized signing, but also the inconsistency and lackadaisical nature that frustrated his new coach Guy McKenna and saw him dropped on several occasions.
Brennan only finished 14th in Gold Coast's club champion award in 2013, a clear disappointment for one of the club's highest paid and most experienced players, and now he has decided to call time on his career.
Gold Coast general manager football operations manager, and Brennan's former teammate at the Brisbane Lions, Marcus Ashcroft paid tribute to what he brought to the Suns in their first three years of existence in the AFL.
"While it is always sad to see one of your experienced players retire, we understand Jared's decision and will assist Jared with his transition into the next phase of his life," Ashcroft said.
"On behalf of everyone involved with the Gold Coast Suns, we want to commend Jared for the contributions he has made to the club, and we wish him every success and all the very best for the future.
"Jared leaves knowing he played an important role in our club's establishment and will always be welcome at the club in the future."