In his first season with the Pacers, McConnell appeared in 71 games, logging 18.7 minutes per contest. He posted averages of 6.5 points, 5.0 assists, 2.7 rebounds and 0.8 steals, while hitting better than 51 percent of his field goals. McConnell shot a career-best 83.3 percent from the line, topping his previous high of 81.1 percent in 2016-17. In his first game with the team, on Oct. 23 against Detroit, McConnell logged 13 minutes off the bench and finished with four points, three rebounds and three assists. On Nov. 8 against those same Pistons, McConnell had a season-high 17 points, in addition to nine assists and five rebounds. The point guard handed out double-digit assists four times, including 11 against the Knicks on Dec. 7. He'd match that total in a win over Phoenix on Jan. 22. In a Feb. 10 game against Brooklyn, McConnell tied his career-high with two blocks. He made his first of three starts on the season against the Bulls on Jan. 10. In the Orlando bubble, McConnell appeared in all 12 of the Pacers' games, including their four playoff matchups against Miami. In an Aug. 4 win over Orlando, McConnell posted 12 points, five assists, four rebounds and a steal in 19 minutes. He played a playoff-high 21 minutes in Game 1 against the Heat, finishing with eight points, eight assists and three rebounds.

T.J. McConnell once again thrived as a backup point guard for the Philadelphia 76ers, his fourth season with the organization. He appeared in 76 games, starting three of them. McConnell averaged 19.3 minutes of court time per contest. The fiesty point guard scored 6.4 points per game and shot a career-best 52.5 percent from the floor, doing the majority of his damage from inside the three-point arc. On, Dec. 12, McConnell scored 17 points, on 9-of-10 shooting, and dished six assists in a loss to the Nets. He scored a season-high 18 points in the regular season finale against Chicago on Apr. 10. For the season, the Arizona Wildcat also produced 3.0 rebounds and 3.4 assists per contest. McConnell was fourth on the team in assists. McConnell had 24 games with at least five assists, including three eight-assist outputs. He also grabbed a season-high six rebounds in a Christmas Day loss to the Boston Celtics. McConnell's Sixers finished with a record of 51-31 and defeated the Brooklyn Nets in the first round of the playoffs. They would then lose to the Raptors in the second round of the playoffs.

McConnell played 76 games for the 76ers during the 2017-18 season, drawing one start and seeing 22.4 minutes per contest. He averaged 6.3 points, 4.0 assists, 3.0 rebounds and 1.2 steals while reaching career highs in field-goal percentage (49.9) and three-point percentage (43.5). McConnell also ranked 13th in the NBA in steal percentage (2.6) and seventh in defensive box plus/minus (1.9). He also set new single-game career highs in points (18) and steals (six). Arguably his best performance of the season occurred Nov. 25 during a 130-111 win over the Magic. He started, played 37 minutes and recorded 15 points (7-12 FG, 1-1 3Pt), 13 assists (one turnover), seven rebounds, three steals and one block. Philadelphia finished the season 52-30, making the playoffs as the third seed in the Eastern Conference. After defeating the Heat in five games during the First Round, the 76ers lost in five games to the Celtics during the Conference Semifinals. Across his 10 playoff appearances, McConnell averaged 5.5 points, 2.6 rebounds and 2.3 assists in 15.5 minutes. His best playoff performance was during a Game 4 victory over the Celtics. McConnell started, played 39 minutes and posted 19 points (9-12 FG, 1-1 3Pt, 0-1 FT), eight rebounds and five assists with no turnovers.

In his second season with Philadelphia, McConnell saw his role expand. He appeared in 81 games, starting 51 contests and seeing 26.3 minutes per game. His increased playing time led to career marks essentially across the board, and he averaged 6.9 points, 6.6 assists, 3.1 rebounds and 1.7 steals. He ranked eighth in total assists (534) and sixth in steals (134) and had five double-doubles. McConnell also set new per-game bests in assists (17), rebounds (10) and steals (five). Arguably his best performance of the season was Jan. 6 against Boston. McConnell started, played 37 minutes and recorded nine points, 17 assists, four rebounds and a steal with just two turnovers. His best stretch of the season was 17 games from Jan. 21-Feb. 25. McConnell averaged 9.5 points on 7.9 shots, plus 7.9 assists (2.1 turnovers), 3.5 rebounds and 1.9 steals in 30.9 minutes. The 76ers finished the season 28-54 and did not qualify for the postseason.

Following two years of college ball at Duquesne and two years at Arizona, McConnell did not hear his name called during the 2015 NBA Draft. However, he signed with the Philadelphia 76ers in late September as an undrafted rookie. McConnell made his NBA debut during the first game of the season -- a 17-point loss to the Celtics in which he posted four points (2-5 FG, 0-1 3Pt), four assists, three steals and one block across 28 minutes. He ended up appearing in 81 games (17 starts) with Philadelphia. As a reserve, McConnell averaged 5.7 points, 4.2 assists, 2.6 rebounds and 1.1 steals in 17.9 minutes. As a starter, he averaged 7.5 points, 5.6 assists, 4.9 rebounds and 1.1 steals in 27.1 minutes. He set single-game career highs of 17 points, 13 assists, nine rebounds, four steals and two blocks. Arguably, his best performance of the season occurred during a five-point win over the Nets on Feb. 6. McConnell recorded 17 points (7-10 FG, 2-2 3Pt, 1-2 FT), six assists, two rebounds and two steals in 28 minutes. His solid play as a rookie was a positive in a challenging season -- from a team perspective -- for the 76ers.