2007-08: Colin Jacobs was chosen in the fourth round, 67th overall, of the 2008 WHL Bantam Draft by the Seattle Thunderbirds.
2008-09: Jacobs saw his first WHL action, appearing in 2 regular season games for the Thunderbirds. He registered no points in those games. In 4 playoff games, he scored 2 goals and added 1 assist for 3 points.
2009-10: In his WHL rookie season, Jacobs played in 72 games for the Thunderbirds. He scored 13 goals and added 13 assists for 26 points while picking up 119 penalty minutes.
2010-11: In 68 games for the Thunderbirds, Jacobs scored 22 goals and added 22 assists for 44 points. He also added 69 penalty minutes on the season. Jacobs played for Team Orr at the 2011 CHL Home Hardware Top Prospects Game, picking up 1 assist in his team's 7-1 win over Team Cherry.
2011-12: Jacobs scored 9 goals with 19 assists for Seattle in his third WHL season – missing 26 games at the beginning of the year due to a shoulder injury. He had 46 penalty minutes and was minus-18 for the last-place Thunderbirds. Seattle missed the playoffs after finishing two points behind fourth-place Everett in the U.S. Division in the race for the final spot.
2012-13: Jacobs made his pro hockey debut with Buffalo's AHL affiliate in Rochester in April after skating for the Prince George Cougars in his fourth WHL season. In 11 regular season games with the Amerks he scored 1 goal with 2 assists and was an even plus/minus. Rochester finished second in the North Division and were swept by first place Toronto in the first round of the playoffs. Jacobs did not play in the playoffs. Obtained by Prince George from Seattle in an August 2012 trade, he was the leading scorer for a young Cougars team that had the WHL's second-worst record. Jacobs scored 25 goals with 28 assists, both career-highs, and was -27 with 98 penalty minutes. He signed a three-year entry-level contract with Buffalo in May, 2013.
Jacobs is a two-way player with good size and a ton of WHL experience under his belt. He has good hands, but what makes Jacobs stand out are his strong leadership qualities and work ethic. He can play either wing and can play on the penalty kill.
Jacobs’ hockey future looked bleak before a trade to Prince George Cougars reinvigorated his career. In his final year of WHL hockey, Jacobs set career highs across the board after a tough season in Seattle the year before. He joined the Amerks for 11 games at the end of the 2012-13 season and was rewarded with an entry-level contract. Jacobs will play in Rochester this season. He is still a couple of years away from the NHL.