Johnson, acquired in a trade with the Baltimore Orioles, was 4-2 with a 6.92 ERA in 38 games with the A's.
Spokeswoman Cindy Posey says the players charged Thursday are wide receivers Kendall Sanders and Montrel Meander. Sanders also faces a charge of improper photography.
The Cavaliers have signed No. 1 overall draft pick Andrew Wiggins, a contract that prevents him from being traded for 30 days.
Knoblauch has been released on $10,000 bond. His first court date is set for July 30
in National, Sports
OSU has fired the director of its celebrated marching band amid allegations he knew about "serious cultural issues" including sexual harassment.