Gist returned for the week of episodes airing March 11 through 15, 1991, because White had a cold at the time of taping. On an episode in November 1996, when Sajak proved unable to host the bonus round segment because of laryngitis, he and White traded places for that segment. On the March 4, 1997 episode, Rosie O'Donnell co-hosted the third round with White after O'Donnell's name was used in a puzzle. On April 1, 1997, Sajak and Alex Trebek traded jobs for the day. Sajak hosted that day's edition of "Jeopardy!" in place of Trebek. Trebek presided over a special two-contestant "Wheel" celebrity match between Sajak and White, who were playing for the Boy Scouts of America and the American Cancer Society, respectively. Lesly Sajak, Pat's wife, was the guest hostess for the day. In January and February 2011, the show held a "Vanna for a Day" contest in which home viewers submitted video auditions to take White's place for one episode, with the winner determined by a poll on the show's website. The winner of this contest, Katie Cantrell of Wooster, Ohio (a student at the Savannah College of Art and Design), took White's place for the second and third rounds on the episode that aired March 24, 2011. In November 2019, three weeks of episodes were taped with White hosting in Sajak's place while he recovered from intestinal surgery. During her time as hostess, several guests appeared at the puzzle board, including costumed performers of Mickey and Minnie Mouse (during the Secret Santa shows), and Maggie Sajak (Sajak's daughter). Charlie O'Donnell was the program's first and longest tenured announcer. In 1980, NBC was discussing cancelling "Wheel" and O'Donnell agreed to take the position as announcer on "The Toni Tennille Show". The network decided against the cancellation but O'Donnell decided to honor his commitment and left the series. His replacement was Jack Clark, who added the syndicated series to his responsibilities when it premiered in 1983 and announced for both series until his death in July 1988. Los Angeles radio personality M. G. Kelly was Clark's replacement, starting on the daytime series in August 1988 and on the syndicated series when its new season launched a month later. Kelly held these positions until O'Donnell was able to return to the announcer position, doing so after his duties with Barris Industries came to an end at the end of the 1988–89 television season.