[5] After playing out 2011 in Collingwood's VFL side, averaging 17 disposals, Seedsman made his debut in round 1 of the 2012 season, against Hawthorn.

[12] He played in all three games for Adelaide in the 2016 NAB Challenge, impressing in the third and final match against Gold Coast where he collected 23 disposals and kicked a goal.

[14] After a good start, Seedsman injured himself in a tackle in the final quarter of the round 3 match against Richmond, but was still able to play the next week.

[16] In the lead-up to the round 14 clash with North Melbourne, Seedsman injured his hamstring in training, sidelining him from the team for several weeks.

[17] When he recovered, rather than going straight back into the AFL side he played his first SANFL match with the reserves team against Sturt, where he starred with 29 possessions and a game-high 10 clearances.

[27] Though he wasn't able to keep his spot in the AFL side, he continued to impress in the SANFL, with an outstanding match against North Adelaide, getting a game-high 29 disposals and also kicking three goals.

When teammate Brodie Smith injured his ACL, Seedsman was seen as the most likely replacement given their similar playing styles and appearances, so he was more secure in his place in the side for the rest of the finals.