Iowa football released its Week 4 depth chart Monday ahead of Saturday’s B1G opener against Penn State.

And the chart excludes a pair of Iowa starters, among others. Starting RB Kaleb Johnson and starting TE Luke Lachey were not listed, nor was backup RB Jaziun Patterson.

Lachey’s absence on the chart is not surprising. Per HC Kirk Ferentz, he suffered a “significant” leg injury in Week 3 against Western Michigan and though nothing has been officially announced, the outlook does not look good. Expect Michigan transfer Erick All to get some run in his absence.

Here’s the rest of the depth chart. Leshon Williams is listed as RB1, with Kamari Moulton and Terrell Washington backing him up.

This is obviously far from ideal for the Hawkeyes, who are entering their toughest test of the season on Saturday against the Nittany Lions.

Penn State has looked the part and then some this year, though they will also be facing their toughest test yet in Iowa. The Nittany Lions are putting up over 460 yards per game, which ranks 3rd in the B1G. Iowa, for reference, is sitting at 13th with 302 yards per game through Week 3.

We’ll see if the Hawkeyes’ defense is able to slow Drew Allar and Co. down at 7:30 p.m. ET in Happy Valley.