Prior to the 2005 season, Graziani signed with the Philadelphia Soul and became the highest-paid player in the league. He completed 328 out of 555 passes that year for 4,272 yards, 90 touchdowns, and 15 interceptions as Philadelphia had a disappointing 6-10 season. In an injury-riddled 2006, he completed 232 of 389 passes for 2,981 yards, 41 touchdowns, and 11 interceptions, but Philadelphia went 9-7 and made the playoffs for the first time ever. Through Week 4 of the 2007 Arena Football League season, Graziani had completed 75 of 116 passes for 1,041 yards, 24 touchdowns, and only three interceptions. At the time, the Soul were undefeated at 5-0. In Graziani's third start against the Colorado Crush he threw for eight touchdowns topping out over 300 yards and only one interception. He suffered a shoulder injury in week 6, and was unable to play for the next five games. He came back in week 12 against the New Orleans VooDoo and went 7-of-15 for 81 yards and four touchdowns. The Soul won the game 78-34.