These are the Oscar Collazo vs. Jayson Vayson round-by-round updates. They provide fans with real-time coverage and live scoring of the upcoming unified strawweight title fight. Scheduled for 12, three-minute, rounds, it serves as the main event on Golden Boy Promotions' Sep. 20 card.Collazo heads into the bout on an impressive run of form. Not only is he undefeated at 12-0, but he is as heavy-handed as a boxer needs to be, with 9 stoppages to his name. He also holds the WBO and WBA (Super) strawweight titles that Vayson will challenge him for.Speaking of Vayson, he is no slouch at 14-1-1. Furthermore, he has respectable punching power himself, with 8 stoppage wins. He will be determined to dethrone Collazo as champion and climb to the division's mountaintop. Unfortunately, he isn't expected to succeed.The oddsmakers at DraftKings Sportsbook have Collazo as a staggering -1400 favorite, while Vayson is a +750 underdog. The main card begins at 8:00 PM E.T. (Eastern Time) / 5:00 PM P.T. (Pacific Time), while the Collazo vs. Vayson headliner is estimated to start at around 11:00 PM E.T. / 8:00 PM P.T.Follow Sportskeeda for play-by-play analysis and live scoring of the upcoming strawweight championship fight.Oscar Collazo vs. Jayson VaysonRound 1: Collazo with pressure right from the onset. Body jabs land for Collazo, while Vayson flicks out a jab upstairs. Another body jab lands for Collazo, who continues to apply steady pressure, backing Vayson up. Double jabs find the mark for Collazo, while Vayson responds with a flurry of body shots.A two-punch combination lands for Collazo, who follows up with body shots. Another body shot lands for Collazo, but he eats a big one himself. Vayson lunges in and Collazo floors him with a check right hook! Vayson pops right back up as the round ends.Our Score: 10-8 CollazoRound 2: Both men trade stiff jabs. Body shots coming from Collazo, who follows up with an uppercut. A big right hand from Vayson catches Collazo coming in sloppily. Vayson strings together a two-punch combination that lands clean. More combinations from Vayson, who seems to be growing in confidence.Collazo returns to the body with a jab. A snappy counter-right hook lands for Collazo. Body shots from Collazo. A good right hand lands for Collazo. They clinch and the referee separates them. They resume with combinations from both men.Our Score: 10-9 Vayson, 19-18 Collazo overallRound 3: Collazo with a body jab, while Vayson lands a counter. They come together and Collazo shoves Vayson, earning a warning from the referee. Body shot from Collazo, while Vayson catches him with a good left. However, Collazo lands a very good right in return.Combinations from Collazo, with a big body shot from Collazo causing Vayson to nearly fold over. More combinations from Collazo, who lands another body shot. Vayson is reacting poorly to these body shots. Stiff jab to the body from Collazo, who lands a follow-up left straight.Slick combination work from Collazo, who traps Vayson against the ropes for the remainder of the round.Our Score: 10-9 Collazo, 29-27 Collazo overallRound 4: Some good combinations from Vayson start the round, but Collazo cracks him with a left and Vayson stumbles. Another big left from Collazo backs Vayson up, but Vayson catches him with an uppercut to the body that seems to have hurt Collazo.Check hook from Vayson. Both men start digging to the body, but Vayson is committing more. Combinations from Vayson, who continues battering the body. Another uppercut to the body lands for Vayson. They clinch and break. Body shots being traded, before Collazo lands a good right upstairs.More uppercuts to the body from Vayson. Collazo pressures Vayson, but eats a counter-right.Our Score: 10-9 Vayson, 38-37 Collazo overallRound 5: Collazo with pressure, landing jabs to the body, before Vayson responds in kind. Collazo leaps in with a stiff left, followed by a good check hook. Vayson with body shots. Left straight for Collazo, while Vayson continues to commit to the body. An intercepting uppercut lands for Vayson, but Collazo answers him with a right.Combination from Vayson. Combinations from Vayson, but Collazo catches him with a right hand. Body shots land for Collazo, who stumbles Vayson with a right to end the round.Our Score: 10-9 Collazo, 48-46 Collazo overallRound 6: Collazo with pressure and a body jab at the start, backing Vayson up. Another body jab lands for Collazo, who follows up with a good left hand. Vayson lands a body shot, but Collazo continues to come forward. Stiff jab from Collazo, but Vayson unloads with a combination to the body.Uppercut from Vayson splits the guard. Collazo digs to the body with hard body shots. Left hook upstairs for Collazo. Check hook for Collazo, and a right hook to the body for good measure.Our Score: 10-9 Collazo, 58-55 Collazo overallRound 7: Two-punch combination from Vayson, while Collazo flurries to the body. They exchange on the inside and Collazo throws Vayson to the mat. Vayson gets back up and the fight resumes with body shots and pressure from Collazo. Good combinations from Collazo.Collazo backs Vayson up, just unloading with volume, landing to the body and head. Vayson's corner throws in the towel. This is bizarre. Vayson was still in this fight and he wasn't, by any means, being dominated.Official DecisionOscar Collazo def. Jayson Vayson via TKO due to a corner stoppage in round seven (1:41)