Claim: Alec Baldwin made one brief and uncredited cameo appearance on 30 Rock.
Evidence: The series stars Fey with a supporting cast that includes Alec Baldwin , Tracy Morgan , Jane Krakowski , Jack McBrayer , Scott Adsit , Judah Friedlander , Katrina Bowden , Keith Powell , Lonny Ross , John Lutz , Sue Galloway , Kevin Brown , Grizz Chapman , Maulik Pancholy , and Rachel Dratch.
From 2006 to 2013 , Baldwin starred as Jack Donaghy on the NBC sitcom 30 Rock , winning two Emmy Awards , three Golden Globe Awards , and seven Screen Actors Guild Awards for his work on the show , making him the male performer with the most SAG Awards.