STRENGTHS:

+ Aerial ability
+ Composure
+ Intercept marking
+ Mobility
+ Running capacity
+ Versatility

IMPROVEMENTS:

- Defensive accountability
- Forward craft

Somewhat a Jack of all trades, O'Sullivan's point of difference is that he has just about also become a master at one, too. With long reach and good aerial range at 198cm, he combines his physical gifts with astute reading of the play as a key defender. O'Sullivan averaged nearly seven intercept possessions, and over two intercept marks in both the National Championships and Coates Talent League this year.

A key factor which aids the utility's prolific work behind the ball is his running capacity. Clocking in an impressive 2km time of 6:11 at the recent National Draft Combine, O'Sullivan uses it on-field to impact from contest to contest - again, most notably in an aerial sense. His running is also observed in attacking phases, as he peels off on turnover to get involved with his side's transitional play out of the back line.

For a tall, O'Sullivan is incredibly comfortable with ball in hand. Given he moves so well, he can work out of tight spots and stand up in tackles to dish off effective disposals, displaying great composure in high-pressure contested situations. A neat ball user by hand and foot, he averaged over 20 disposals, seven marks and four rebound 50s with the Bushrangers, hardly looking out of place as a rebound or playmaking outlet.

Another of O'Sullivan's prized assets is his versatility. While arguably best down back, he seems determined to be known as a swingman and has even been tasked with going on-ball. As such, he can look to improve his forward craft in order to switch between ends more seamlessly. In particular, his goal kicking accuracy is an area for growth. Otherwise, he has the physical tools and natural ability to play wherever required.

Arguably the only thing he can work on defensively is his accountability and one-on-one craft. O'Sullivan is so good at peeling off and roaming the back half as he pleases, but was found out by a couple of quality opponents late in the season, who he perhaps allowed too much leeway.

O'Sullivan racked up 26 disposals, eight marks and five rebound 50s in Murray's one-point win over Calder in Round 15, but his direct opponent Jordan Croft bagged 3.4 from 17 disposals and seven marks. Similarly, GWV bottom-ager gave him trouble with his speed and aerial work on the lead. With that in mind, there is still a bit to work on for O'Sullivan, but an abundance of upside nonetheless.