2008-09: Jonathan Parker was offered a tryout by WHL Seattle after putting up 85 points in 60 games for the Los Angeles Junior Kings U-18 the previous season, Parker skated in 65 games for the Thunderbirds. In his first WHL season he scored 17 goals with 22 assists and was minus-three with 55 penalty minutes. Six of his 17 goals were scored on the Thunderbirds power play. Seattle finished third in the U.S. Division. Parker saw limited ice time in the five-game playoff series with Spokane and had no points nor penalty minutes.
2009-10: Parker began his second WHL season with Seattle and was obtained by Prince Albert in exchange for defenseman Ryan Aasman in a January trade. Parker was one of the top scorers for the Thunderbirds at the time of the trade, scoring 13 goals with 13 assists in 40 games on a team that would finish with the WHL's second-worst record. He struggled offensively following the trade playing more of a checking line role, and finished plus-one with 2 goals and 2 assists with 24 penalty minutes in 29 games for the Raiders. Prince Albert missed the playoffs; finishing fifth in the East Division.
2010-11: Parker had a breakout offensive season for Prince Albert in his third WHL season. He finished fifth in the WHL with 45 goals and had 41 assists to lead the Raiders with 86 points. Parker ended the year with a minus-eight plus/minus and had 45 penalty minutes in 71 games. Prince Albert reached the WHL playoffs; finishing fourth in the East Division despite a sub-.500 record. Parker had 3 assists and was minus-five with 4 penalty minutes in the six-game playoff series with Saskatoon. He was ranked 186th amongst North American skaters in Central Scouting's final rankings prior to the 2011 NHL Draft but was not selected.
2011-12: Parker impressed at the Sabres' prospect camp and after earning an invitation to the team's main camp was signed to a three-year entry-level by Buffalo in October 2011. He split his first pro season between Buffalo affiliates Rochester (AHL) and Gwinnett (ECHL). He scored 3 goals with 3 assists and was minus-four with 6 penalty minutes in 37 games for the Amerks. Parker scored 4 goals with 7 assists in 19 ECHL games with the Gladiators and was minus-five with 10 penalty minutes.
Parker has a good shot but his defining characteristic is his ability to play hard every shift. Although small at just 5’10, he is not afraid to take a hit to make a play. As a result, Parker takes a lot of hits, and barring an injury, projects to be a third or fourth line energy player.
Parker split the season with the ECHL and AHL, but looks to stick with the latter for most of the 2012-13 season.