He has written 15 US number one hits and several Top 20 singles for Tim McGraw, The Oak Ridge Boys, Reba McEntire, Vince Gill, Faith Hill, Shenandoah, Neal McCoy, Highway 101, Restless Heart, Ricochet, John Anderson, Montgomery Gentry, Brooks & Dunn, George Strait, Pam Tillis, Martina McBride, Trace Adkins, Travis Tritt, Bryan White, Billy Currington, Etta James, Delbert McClinton, Van Zant, Tanya Tucker, Patty Loveless, and many others.

[1] DiPiero's first number one hit as a songwriter was 1983's "American Made" by The Oak Ridge Boys; it also became a national advertisements jingle for Miller Beer and Baby Ruth candybar.

[3] In 1995 and 1996, he received the Triple Play award from the Country Music Association for 3 number one singles charted in each of those years.

[3][4] He was also one third of the country music supergroup Billy Hill; members included Dennis Robbins and John Scott Sherrill.

He helped make Nashville a port-of-call for legendary performers from all genres, writing with Neil Diamond, Carole King, Johnny Van Zant, and Delbert McClinton, among many others.