2017: Appeared in 34 matches in USL play for Sacramento Republic FC, tallying six goals and three assists. He recorded his first assist of the year against Orange County SC on April 1 before scoring the game-winner in the following match against Tulsa Roughnecks FC. His next goal came against Seattle Sounders FC 2 on May 28 before scoring three goals in four games from June 21-July 23 against Rio Grande Valley FC, LA Galaxy II and Sounders 2. He scored his sixth and final goal of the season against the Swope Park Rangers in a 2-2 draw at Papa Murphy’s Park on August 23, with his goal tying the game in the 88th minute. He provided his second and third assists of the season in back-to-back games against Colorado Springs and RGVFC on September 2 and 9, respectively.
2016: Played in 26 games for Phoenix Rising FC, then Arizona United SC, scoring eight goals and adding one assist in USL regular-season play. He scored the game-winning goal on his debut against Real Monarchs SLC on April 15 before tallying in three straight games from June 18-25 against Saint Louis FC, Rio Grande Valley FC and Sacramento Republic FC. Added his fifth goal of the season in a 3-0 win over the Monarchs on July 22 before scoring in back-to-back games against Orange County on August 7 and San Antonio FC on August 13 – which stood as the game-winner. He scored his final goal of the season in a loss to Vancouver Whitecaps FC 2 on August 21.
Before USL: Blackwood previously spent time in his home town with Queens Park Rangers in the English Championship and on loan with League Two outfit Newport County. He scored one goal across four appearances with both clubs. He played in one game in the English Championship for QPR, appearing as a substitute against Derby County on November 3, 2015, while he made his loan start for the club in a 3-0 win over Yeovil Town in the First Round of the EFL Cup on August 11, 2015. Blackwood scored his lone goal in English football with the game-winner for Newport County against Carlisle United in League Two on September 26, 2015.
College: Blackwood played college soccer for the University of Tampa, tallying 24 goals and eight assists in 33 games before transferring to University of South Florida ahead of his senior year, where he scored four goals and tallied three assists in 18 appearances.