Avante Cox had a career-high 10 receptions for 148 yards and a touchdown, Romeir Elliott scored on a 5-yard run midway through the fourth quarter and Southern Illinois beat South Dakota 22-10 on Saturday night in the first round of the FCS playoffs. Despite both teams being in the Missouri Valley Football Conference, the programs hadn't faced off since the Salukis won 48-28 at South Dakota in 2019. The Salukis (8-4), ranked No. 23 in the FCS coaches poll, plays at third-ranked and No. 2 seed North Dakota State — another MVC member — next Saturday.