Lee Marvin vs. Derek Jeter

"Lee Marvin vs. Derek Jeter" is the seventeenth episode of the fourth season of the American television comedy series 30 Rock, and the 75th overall episode of the series. It was written by co-producer Kay Cannon and series creator Tina Fey. The episode was directed by series producer Don Scardino. It originally aired on NBC in the United States on April 22, 2010. Guest stars in this episode include Elizabeth Banks, Will Ferrell, Steve Hely, Julianne Moore, and Ariel Shafir.

In the episode, Liz Lemon (Fey) starts making an effort to date by attending singles events with her friend Jenna Maroney (Jane Krakowski). At the same time, Jack Donaghy (Alec Baldwin) feels forced to choose between his high school sweetheart, Nancy Donovan (Moore), and news anchor Avery Jessup (Banks). Meanwhile, a racist comment sparks an office-wide debate on affirmative action and leaves James "Toofer" Spurlock (Keith Powell) with a big decision to make regarding his future at the fictitious television series The Girlie Show with Tracy Jordan (TGS).

"Lee Marvin vs. Derek Jeter" received generally positive reviews from television critics. According to the Nielsen ratings system, the episode was watched by 4.216 million households during its original broadcast, and received a 1.9 rating/6 share among viewers in the 18–49 demographic. Kay Cannon and Tina Fey were nominated for a Primetime Emmy Award nomination in the category for Outstanding Writing in a Comedy Series for their work in this episode.