- Perhaps he was considered for the tour but they got Bobby, with whom Jon apparently is friends, instead.
- Perhaps he was considered to play some leads when Richie had hurt his shoulder but Jon did that instead (and we know how THAT sounded!).
- Perhaps he was considered for the tour but the band was afraid that the fans wouldn't want an "outsider" on the road.
- Perhaps he was considered for the tour but was eventually too busy with production commitments.
- Perhaps a mixture of all of the above.