From the Sandringham Dragons in the TAC Cup, Jacobs was Port Adelaide's first selection and the 16th overall selection in the 2010 AFL draft. He is known for his excellent marking with great core strength, having the ability to run all day and execute by hand. Jacobs won All-Australian honours in the 2010 NAB AFL U18 Championships and averaged 29 disposals at 69 percent efficiency, including a 47 possession game against South Australia.[1]
He was given the number 16 guernsey, by retired Port Adelaide premiership captain, Warren Tredrea.[2]
Jacobs was predicted to make his debut in the opening round of the 2011 AFL season, however he contracted glandular fever during the pre-season and was admitted to hospital for five days. He recovered from the illness and made his debut in Round 8.[3]
During the 2012 season Trade Period, Jacobs requested a trade to North Melbourne which did not happen. Soon after, Jacobs announced that he would not be re-signing with Port and that he would be entering the National Draft.
In the 2012 National AFL Draft, Jacobs was taken at Pick 37 by North Melbourne Football Club. Jacobs had 2 very mediocre seasons to start his career at North Melbourne but had a breakout season in 2015, as he developed into the team's tagger. He played in 23 games and performed shut down roles against Trent Cotchin, Dan Hannebery, Dylan Shiel and Nathan Jones.[4]
Jacobs started off the 2016 season well, but in Round 8 injured his foot and didn't play a single AFL game for the rest of the year.[5]
