Josh Jacobs has the fewest rushing yards per attempt by a running back with 50+ carries this season, with 3.2 per attempt.

lowest ypc by a rb this year (minimum 50 attempts)
Interpreted as:
lowest ypc by a rb this year (minimum 50 rushing attempts)
2021Jacobs2021Davis2021Swift2021Ingram2021Conner2021Murray2021Barkley2021Michel2021Harris2021Moss2021McCaffrey2021Hubbard2021Kamara2021Mattison2021Gibson2021Harris2021Fournette2021Carson2021Williams2021Mixon2021Montgomery2021Gordon2021Cook3.23.33.33.33.43.63.63.83.83.93.93.93.93.94.04.14.34.34.34.34.54.54.6
NAMESEASONTMGPYPCATTRUSH YDSRUSH YDS/GRUSH TDREC YDSRECTRGAVGREC YDS/GREC TD
Josh JacobsJosh Jacobs2021LVLV43.25417543.847111136.517.80
Mike DavisMike Davis2021ATLATL53.36220440.818818244.917.61
D'Andre SwiftD'Andre Swift2021DETDET63.36521435.7329534428.749.21
Mark IngramMark Ingram2021HOUHOU63.38628547.516461.51.00
James ConnerJames Conner2021ARIARI63.47927245.3534556.85.70
Latavius MurrayLatavius Murray2021BALBAL63.65921235.3425456.34.20
Saquon BarkleySaquon Barkley2021NYGNYG63.65419532.5213014209.321.71
Sony MichelSony Michel2021LARLAR63.85420534.2120455.03.30
Najee HarrisNajee Harris2021PITPIT63.810238864.7224434467.240.72
Zack MossZack Moss2021BUFBUF53.95420841.63109101410.921.81
Christian McCaffreyChristian McCaffrey2021CARCAR33.95220167.01163161710.254.30
Chuba HubbardChuba Hubbard2021CARCAR63.97228146.818213196.313.70
Alvin KamaraAlvin Kamara2021NONO53.99436873.6111315227.522.63
Alexander MattisonAlexander Mattison2021MINMIN63.96826844.7012015178.020.01
Antonio GibsonAntonio Gibson2021WASWAS64.08935759.5311912169.919.81
Damien HarrisDamien Harris2021NENE64.18133155.2353896.68.80
Leonard FournetteLeonard Fournette2021TBTB64.37833255.3321325308.535.50
Chris CarsonChris Carson2021SEASEA44.35423258.0329664.87.30
Jamaal WilliamsJamaal Williams2021DETDET64.35925542.529916186.216.50
Joe MixonJoe Mixon2021CINCIN64.311148080.039013166.915.01
David MontgomeryDavid Montgomery2021CHICHI44.56930977.3349698.212.30
Melvin GordonMelvin Gordon2021DENDEN74.57835050.0213315198.919.01
Dalvin CookDalvin Cook2021MINMIN44.68036691.527312186.118.30
Darrell HendersonDarrell Henderson2021LARLAR54.68137274.4411912169.923.81
Javonte WilliamsJavonte Williams2021DENDEN74.66932045.7112220226.117.41
StatMuse has season-level data for rush attempts and rushing yards per attempt going back to the 1932 season.