This may not be the complete list because it is easy to miss guys, but I have compiled a list of Tulane's incoming transfers (JC guys and portal guys) starting with 2018, the year the portal was created. Here's an analysis of their effect:
2018
QB Justin McMillan (grad transfer, LSU)
OT Noah Fisher (grad transfer, South Alabama)
RB Corey Dauphine (transfer, Texas Tech)
Analysis: Tulane would not have gone to its first bowl game in five years without the addition of McMillan and Dauphine. McMillan took over for the erratic Jonathan Banks as the starter for the last five games of the regular season and guided Tulane to a 4-1 record before an impressive bowl win against ULL, which was one of the two or three best all-around performances of the Willie Fritz era. Dauphine was a home run threat every time he touched the ball, rushing for 802 yards and seven touchdowns. Fisher was so-so, losing his starting job at left tackle at midseason for three games but regaining it. He had been a full-time starter for multiple years at South Alabama.
2019
WR Jalen McCleskey (grad transfer, Oklahoma State)
OL Christian Montano (grad transfer, Brown)
OL Ben Knutson (grad transfer, Virginia)
DE Malik Lawal (grad transfer, Arizona State)
DE Mike Hinton (grad transfer, Columbia)
LB Nick Anderson (JC transfer)
QB Keon Howard (transfer, USM)
Analysis: Again, Tulane probably would have not reached a bowl game without this group, but their impact was varied. McCleskey was solid and had the huge game against Houston with the dramatic tie-breaking touchdown in the final seconds, but it felt like he should have been even better. McMillan's passing issues, which were exposed in 2019 more than in 2018, were a factor. McCleskey finished with 37 catches for 581 yards and four touchdowns. Anderson (26 tackles), a backup, was not consistent yet, but he saved his best for the bowl game and gave an indication of what he would become. Knutson started six games at guard but appeared slow. He had a better season in 2020. Montano was a great guy who started all 13 games at center, but he was not a difference-maker. Lawal had 37 tackles and a sack while starting three times and playing in all 13 games, but he was not the pass rusher he was supposed to be. Hinton was largely a non-factor (11) tackles as a reserve. Howard, eligible to play after sitting out his transfer year in 2018, entered four games as a reserve but did not get any meaningful downs. He was terrible as a starter in 2020 before getting replaced by Michael Pratt in the third game.
2020
LB Kevin Henry (grad transfer, Oklahoma State)
OL Jaylen Miller (grad transfer, Duke)
WR Mykel Jones (grad transfer, Oklahoma)
WR Duece Watts (JC transfer)
WR Phat Watts (JC transfer)
Analysis: Their impact was significantly lighter than in the previous two years, although Henry (31 tackles) started at linebacker and was a solid member of a talented group that went four deep before he sustained a season-ending injury on a questionable low block from a Navy lineman. Duece Watts led the team with 31 catches for 512 yards and six TDs but was raw. Phat Watts had 17 catches for 217 yards and was even rawer. Jones (11 catches, one TD) could not stay healthy and was not much of a factor before he got hurt. Miller was a disappointment, playing in eight games but not effectively after coming in expecting to be a full-time starter.
2021:
WR Shae Wyatt (grad transfer, Central Missouri)
S Derrion Rakestraw (grad transfer, Colorado)
DE JoJo Dorceus (grad transfer, Memphis)
CB Lance Robinson (transfer, Kansas State)
WR Cyron Sutton (transfer, Southeastern)
CB DJ Douglas (transfer from Alabama, where he was a walk-on)
OL Hayden Shook (JC transfer)
Analysis: A mixed bag. Wyatt, the guy fans were probably the least excited about because he had played for a Division II program, had the best year of the bunch. He was no game-breaker, but he ran solid routes and had good hands, putting him ahead of the other receivers in a discombobulated year. He led the team with 33 catches (for 376 yards). Dorceus (37 tackles, 3.5 sacks) started a bit slowly but really came on in the second half of the year, making a difference on the outside. Rakestraw, quite frankly, was less impressive than I thought he would be after he put up good numbers in a COVID-shortened season for Colorado in 2020. He was serviceable with 32 tackles and one interception but nothing more than serviceable. Sutton had no impact whatsoever before getting hurt. I requested him for an interview near the end of preseason drills and later found out Chip Long had asked the SID who informed him of the interview request why I wanted to talk to a fourth-string receiver. Douglas showed why he was a walk-on rather than a scholarship player at Alabama, playing sparingly and finishing with five tackles, but he looked better this spring. Shook was a miss, working with the third-team offensive line. The coaches recruit JC guys to be impact players right away, and he was invisible.
2022
RB Ashaad Clayton (transfer, Colorado)
DT Patrick Jenkins (transfer, TCU)
S Lummie Young (grad transfer, Duke)
CB Jarius Monroe (transfer, Nicholls)
WR Dea Dea McDougle (transfer, Maryland)
WR Lawrence Keys (transfer, Notre Dame)
OL Kanan Ray (transfer, Colorado)
OL Prince Pines (transfer, Sam Houston and Baylor)
DL Tylo Phillips (transfer, Lamar)
K Valentino Ambrosio (transfer, Rutgers
Analysis: These 10 transfers should be the biggest impact group of the Fritz era. These guys are going to determine whether or not Tulane can rebound from its 2-10 season and contend for the AAC title. Jenkins appeared to be the real deal in the middle during the spring and will be counted on tremendously with the departure of Jeffery Johnson to Oklahoma. Ashaad Clayton is in the mix for No. 2 back to Tyjae Spears and showed good potential in the spring. Jarius Monroe might turn out to be the top guy in the group and is a potential starter at cornerback, a spot Tulane has really struggled at in the past two years. He plays with tremendous confidence and enthusiasm. Young is in the mix to start at safety. McDougle and Keys were disappointments in the spring at a position that needs an influx of talent. McDougle had a good spring game but drew the coaches' ire for most of the practices that preceded it. Keys wasn't healthy, so he needs to make an impact in preseason drills. Ray was a former 4-star recruit who had significant playing time for Colorado, although he lost his starting job last year. Pines has good credentials as a former starter (briefly) at Baylor and full-time starter at Sam Houston State for an offensive line that needs to play better. I don't know anything about Phillips, who transferred after spring drills along with Pines, but depth on the defensive line is always important and he can play inside or outside. Ambrosio absolutely, positively needs to be good. Merek Glover struggled mightily last year, and now that he's gone, his replacements in the spring were significantly worse than he was. There will be no breakthrough no matter what else happens if Tulane cannot reliably make kicks from 40 yards and in.