DES MOINES, Iowa (AP) — With just six games left before the Big Ten tournament, Iowa has clearly made progress under coach Fran McCaffery. The Hawkeyes (13-12, 5-7 Big Ten) have already won more games than they did in each of the previous two seasons, both overall and in the league, and a .500 finish in the Big Ten remains within reach. Iowa might be in position to do even bigger things in McCaffery’s second season if it wasn’t for such a porous defense. The Hawkeyes rank last in the Big Ten in scoring defense by nearly five points a game, and they’re also bringing up the rear in field goal percentage defense. Shoddy defense has been a season-long trend for the Hawkeyes, one that has McCaffery searching for answers as they prepare to play Penn State (11-15, 3-10) on Thursday.