Answer by taking a quote from the following article:

Widespread Panic is an American rock band from Athens, Georgia. The current lineup includes guitarist/singer John Bell, bassist Dave Schools, drummer Duane Trucks, percussionist Domingo "Sunny" Ortiz, keyboardist John "JoJo" Hermann, and guitarist Jimmy Herring. The band's original drummer, Todd Nance, left in 2016. The band was formed in Athens, Georgia, in 1986, and is influenced by the Southern rock, blues-rock, progressive rock, funk and hard rock genres.

In 2003, the band released Ball, the first studio album with McConnell as the guitarist. The album was unique among the band's offerings in that none of the songs included had been performed live by the band prior to the recording. All of the material included was written specifically for the album with the exception of "Time Waits," a song which John Bell had performed in solo appearances, and "Don't Wanna Lose You," a song John Hermann had performed with his side-project Smiling Assassins. Late in 2003, the band announced that they would be taking a hiatus from both recording and performing in 2004. However, 2004 did see the release of three live albums, engineered by Billy Field: Night of Joy and Uber Cobra--both of which were recorded during a November 2003 three-night run of shows at the House of Blues in Myrtle Beach, SC--as well as Jackassolantern, a compilation of cover songs performed during the band's Halloween shows over the years. A third release from the Myrtle Beach shows, Live at Myrtle Beach was released in early 2005.  In January 2006, the band recorded their 9th studio album, Earth to America, in Nassau, Bahamas at Compass Point Studios, with Terry Manning producing. It was released June 13, 2006. Their May 9 show at Atlanta's Fox Theatre was simulcast in LIVE HD, via satellite, in select movie theatres nationwide. Over 60,000 fans across the country watched it live in the theatres. This show was also released in DVD format on November 14, 2006, entitled 'Earth to Atlanta'.  On August 2, 2006, nearing the end of the summer tour, the band announced that George McConnell had left the band, making July 30, 2006 at the Fox Theater in St. Louis, MO his last show. Producer John Keane and former guitar technician Sam Holt filled in on guitar for the remaining two weeks of the tour.

Who took his place when he left?
Sam Holt