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Polymarket promo code SPORTSLINE: Get $25 bonus for Alabama-Mississippi State, Ohio State-Iowa, college football on Saturday
New Polymarket users can get a $25 bonus after depositing $10 or more to make trades
The Polymarket promo code SPORTSLINE gives new users a $25 bonus after they sign up and deposit at least $10, which includes college football prediction markets. There are 16 games involving ranked teams on Saturday, most notably the matchup between No. 5 Ohio State (3-1) and No. 14 Iowa (4-0) scheduled for a 2:30 p.m. ET kickoff. Click here to get started at Polymarket and claim your $25 bonus after depositing $10 with the Polymarket promo code SPORTSLINE:
Iowa remains undefeated following a 20-19 road win against Michigan in Week 4. Meanwhile, Ohio State has bounced back from its Week 2 loss to Texas with blowout wins against Kent State in Week 3 and Illinois in Week 4.
The Week 5 Saturday slate will also include No. 7 Alabama (4-0) vs. No. 16 Mississippi State (4-0) at 12:00 p.m. ET and Washington (3-1) vs. No. 18 USC (4-1) at 7:30 p.m. ET. Visit the Polymarket promo code review page for the terms and conditions of this offer.
How to sign up for the Polymarket referral code SPORTSLINE
You can sign up for Polymarket, one of the top prediction market sites, using the steps listed below. This offer is only available for new users.
- Click CLAIM BONUS on this page. Download the Polymarket app.
- Create an account and provide all the required information, such as name, email and payment details. Use the code SPORTSLINE to get your bonus.
- Make a first deposit by your preferred deposit method and follow the prompts.
- New users must deposit at least $10 in contracts for the $25 trading bonus to be applied to their account.
After depositing $10 with the Polymarket promo code, new users will be given a $25 trading bonus:
Ohio State vs. Iowa predictions
Ohio State has won seven of its last eight games against Iowa, which includes back-to-back blowout wins in 2023 and 2024. Buckeyes quarterback Julian Sayin has thrown for 1,206 yards, 10 touchdowns and one interception on 83 of 115 passing, while also recording two rushing touchdowns, in his first four games.
Iowa quarterback Hank Brown threw for 227 yards and two touchdowns on 21 of 35 passing during last Saturday's win at Michigan. Brown, who transferred from Auburn prior to the 2025 season, has thrown for 700 yards and five touchdowns on 66 of 97 passing through his first four games.
Ohio State is currently trading at $0.49 per share to win by 15 or more points, while Iowa is trading at $0.52 per share to lose by 14 or fewer points or win outright, at Polymarket. Trade on college football games and more with the Polymarket promo code SPORTSLINE:
Alabama vs. Mississippi State trading preview
Alabama ranks third among SEC teams in scoring offense with 48.0 points per game and second with a +27.8 through its first four games. The Tide have totaled 753 yards and 13 touchdowns on 155 rushing attempts (4.9 yards per carry), with Daniel Hill recording a team-best 225 yards and four touchdowns on 46 carries.
Mississippi State ranks fourth among SEC teams in scoring offense with 43.0 points per game and fifth with a +22.0 scoring margin. Quarterback Kamario Taylor has thrown for 1,192 yards, an SEC-best 14 touchdowns and two interceptions on 83 of 120 passing, while also recording 185 yards and one touchdown on 37 rushing attempts.
Alabama is currently trading at $0.48 per share to win by seven or more points, while Mississippi State is trading at $0.53 per share to lose by six or fewer points or win outright at home, at Polymarket. Trade on college football games and more with the Polymarket promo code SPORTSLINE:
Washington vs. USC predictions
Washington is coming off a 27-24 loss to Minnesota in Week 4, having nearly rallied back from a 24-10 third quarter deficit. Quarterback Demond Williams Jr. threw for 239 yards, two touchdowns and two interceptions on 18 of 28 passing during the loss and enters Week 5 with 1,129 yards, seven touchdowns and three interceptions on 95 of 137 passing, as well as 165 yards and two touchdowns on 40 rushing attempts.
USC suffered its first loss of the season in a 41-27 defeat by Oregon in Week 4. The Trojans allowed 504 yards of total offense, despite the Ducks losing starting quarterback Dante Moore after he sustained a concussion in the second quarter, with former Nebraska transfer Dylan Raiola taking over in his absence.
Washington has won three consecutive games against USC since 2019. The Trojans are currently trading at $0.52 per share to win by 10 or more points, while the Huskies are trading at $0.49 per share to lose by nine or fewer points or win outright, at Polymarket. Trade on college football games and more with the Polymarket promo code SPORTSLINE:
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Written by Jason Hall
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