Griffiths came off the bench around the hour mark for his first taste of pre-season action having reported back out of shape after the lockdown.
Changes could be on the way next season.
Kettlewell was able to field two different line-ups against Livingston and Celtic.
Jose Mourinho has opened the door for Jan Vertonghen to return to Spurs one day.
The Toffees finished 12th in the Premier League.
Deposed Premier League champions may play a friendly match as they focus on the Champions League.
Saints finished the season in 11th and were one of the stars of ‘Project Restart’.
Gino Pozzo gives hope to Hornets fans after five-year stay in the top flight ended.
Hearts and Thistle have also lost out on their demands for a combined total of £10million in compensation.
The Croatia international ended a six-year spell at Anfield after making only 15 appearances this season.