In 1998, he only made two of thirteen cuts but won the Nike St. Louis Golf Classic.

He only played in four events from 2007 to 2008 but rejoined the Tour in 2009 after going through qualifying school for a second time.

His highlight on the Champions Tour came in 2009 at the Senior PGA Championship where he finished in a tie for fifth.

Starkjohann was a member of the United States PGA Cup team that defeated Great Britain & Ireland 13½ to 12½ in 2007.

He has been named the PGA National Senior Player of the Year three times (2006, 2007 and 2009), Southern California PGA Section Player of the Year six times, Southern California PGA Section Senior Player of the Year twice and the PGA San Diego Chapter Player of the Year five times.