The Hawkeyes (3-1) now enter Big Ten play with a three-game winning streak, their longest since 2010.
Martin-Manley scored on returns of 83 and 63 yards early in the second quarter as Iowa jumped out to a 38-3 halftime lead.
Lowery took back picks for 35 and 13-yard TDs for Iowa, which scored its most points since it had 62 against Northwestern in 2002.
Tyler Van Tubbergen had 114 yards passing for the Broncos (0-4).
Nike Men's Iowa Hawkeyes Black/Gold Team Issue Performance PoloShop
Dolphins first-round draft pick Laremy Tunsil says he took money from a coach while he was a player at Ole Miss.
Crimson Tide defensive line coach Bo Davis is leaving the school amid NCAA and school inquiries over potential recruiting violations, The Tuscaloosa News has reported.
SEC Network's Paul Finebaum discusses the Big 10's celebration after the satellite camp ban was lifted but the SEC is still dominant.
Nick Saban does a live interview with SportsCenter prior to the NFL draft in his car. He discusses the Alabama players in the draft tonight and how he will spend his time at the draft
Former Ohio State running back Ezekiel Elliott wears a cut off shirt on the red carpet, reminiscent of the way he wore his jersey with the Buckeyes in the 2014 season.
On The Paul Finebaum Show, Marcus Spears ranks the top NFL prospects from the SEC.