[4] After serving as an intern covering sports for Newsday on Long Island, Rosenthal began his career at the York Daily Record in 1984.

He regularly wears a bow tie when appearing on Fox Sports telecasts in support of various charitable organizations.

[6] In June 2017, FoxSports.com eliminated its writing staff to focus only on video, leaving Rosenthal without an editorial home.

[11][12] On November 12, 2019, Rosenthal and Evan Drellich were the first to break the news on the Houston Astros sign stealing scandal, reporting that during the 2017 MLB season, the Astros used a camera in center field to see what signal the catcher was giving, then banged on a metal trash can to relay it to the batter.

"[14] With MLB Network, Rosenthal contributed to Trade Deadline and National Baseball Hall of Fame coverage, as well as the offseason weekday morning show Hot Stove.