Middle Tennessee entered the bowl with a 7–5 record (4–4 in conference). Middle Tennessee finished tied for fourth in the final Conference-USA standings for the season, posting the same conference record as both UAB and Florida Atlantic. This is Middle Tennessee's 14th bowl game appearance and 9th at the NCAA Division I level, with a prior record of 5–8 in bowl games (3–6 at Division I). It is Middle Tennessee's second appearance in the Hawaii Bowl, having previously played in the 2016 edition.
San Diego State entered the bowl with a 7–5 record (5–3 in conference). San Diego State tied for second in the West Division of the Mountain West Conference with San Jose State. This is San Diego State's 20th bowl game appearance, with a prior record of 10–9 in bowl games. This is San Diego State's second Hawaii Bowl appearance, having previously played in the 2015 edition. It is also San Diego State's third postseason game in Honolulu; the school played in the 1952 Pineapple Bowl where they defeated Hawaii 34–13.