Kerryon Johnson will miss this week with a knee injury; he might be out multiple games. That leaves the Lions with just third-down back Theo Riddick and short-yardage guy LeGarrette Blount. A shame they recently released Ameer Abdullah. But the Lions say they're confident in Zach Zenner.

Detroit actually released Zenner with an injury settlement in August, but he's back on the roster. "He’s done a great job since he’s been back," Lions head coach Matt Patricia said of Zenner. “He’s done a lot out at practice that we feel very confident with him out there. I think he’s a great example of a guy that’s just – he’s such a professional. He’s just always ready to go."

Zenner didn't play much last season, though he did in the 2016 season. Dipping into the stat files, there's a hint as to why he hasn't gotten much work since then. (And also why Theo Riddick doesn't carry it much any more.)

Back in 2016, 69 different running backs had at least 50 rushing attempts. Zenner was stuffed (gaining no yardage, or losing yardage) on nearly 16 percent of those carries. Only three backs were stuffed on a higher percentage of their carries that season: James Starks, Doug Martin and Riddick.

RUNNING BACK STUFFS, 2016
PlayerAttStuffPctAtt/Stf
Theo Riddick921718.5%5.4
James Starks631117.5%5.7
Doug Martin1442316.0%6.3
Zach Zenner881415.9%6.3
LeSean McCoy2343615.4%6.5
Duke Johnson Jr.731115.1%6.6
Justin Forsett871314.9%6.7
Kenneth Dixon881314.8%6.8
Thomas Rawls1091614.7%6.8
Isaiah Crowell1982914.6%6.8
Devonta Freeman2273314.5%6.9
Jerick McKinnon1592314.5%6.9
Wendell Smallwood771114.3%7.0
Jay Ajayi2603714.2%7.0
Charles Sims51713.7%7.3
Charcandrick West881213.6%7.3
Chris Ivory1171613.6%7.3
Christine Michael1482013.5%7.4
Kenneth Farrow60813.3%7.5
Jacquizz Rodgers1291713.2%7.6
T.J. Yeldon1301713.1%7.6
Melvin Gordon2543313.0%7.7
Carlos Hyde2172812.9%7.8
Darren Sproles941212.8%7.8
Shaun Draughn74912.2%8.2
Todd Gurley2783311.9%8.4
Ryan Mathews1551811.6%8.6
LeGarrette Blount2993411.4%8.8
Jeremy Langford62711.3%8.9
DeMarco Murray2933311.3%8.9
C.J. Anderson1101210.9%9.2
Terrance West1932110.9%9.2
Jonathan Stewart2182310.6%9.5
Matt Forte2182310.6%9.5
Rashad Jennings1811910.5%9.5
Ty Montgomery77810.4%9.6
Matt Jones991010.1%9.9
Dwayne Washington90910.0%10.0
David Johnson293299.9%10.1
Rob Kelley168169.5%10.5
Jeremy Hill222219.5%10.6
Rex Burkhead7479.5%10.6
Tevin Coleman118119.3%10.7
Devontae Booker174169.2%10.9
Alfred Morris6968.7%11.5
Eddie Lacy7168.5%11.8
Bilal Powell131118.4%11.9
Jordan Howard252218.3%12.0
Lamar Miller268217.8%12.8
Ezekiel Elliott322257.8%12.9
Derrick Henry11087.3%13.8
Jalen Richard8367.2%13.8
Latavius Murray195147.2%13.9
DeAngelo Williams9877.1%14.0
Fozzy Whittaker5747.0%14.3
Spencer Ware214157.0%14.3
Mike Gillislee10176.9%14.4
Mark Ingram205146.8%14.6
Tim Hightower13396.8%14.8
Matt Asiata12186.6%15.1
Giovani Bernard9166.6%15.2
Dion Lewis6446.3%16.0
Alfred Blue10066.0%16.7
DeAndre Washington8755.7%17.4
Peyton Barber5535.5%18.3
Frank Gore263145.3%18.8
LeVeon Bell261135.0%20.1
Paul Perkins11254.5%22.4
Chris Thompson6834.4%22.7

Maybe Zenner ends up being a better runner than either Blount or Riddick. But he's unlikely to do much against the Bears tomorrow, and probably won't do much until Johnson returns.

--Andy Richardson