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.
Jacobs was a highly sought after prospect who turned down the USNTDP for the Thunderbirds. He is a heady, two-way player with good size who already has tons of experience at the WHL level, having played his first full season at just 16. However, his game still needs to mature, but there is no denying that Jacobs has enough talent to at least get a taste of the NHL.
After posting the worst numbers in his junior career coming off surgery, Jacobs was given a clean slate and traded to the much improved Prince George Cougars squad, where he figures to play a significant role.