Yes. From the OHSAA general regulations:
4.9) Members of the Interscholastic Coaching Staff – Team Sports – In non-interscholastic participation (contests, tryouts, training and practices) in team sports, members of the school’s interscholastic coaching staff may coach interscholastic squad members from the school district where employed for a maximum of 10 days from June 1 to July 31. The 10-day limitation applies to the entire coaching staff. Each individual coach is not entitled to 10 different days for coaching.
Note: The Board of Directors may further limit the number of contact days during this period as specified in the specific sports regulations.
EXCEPTION 1: The paid or unpaid interscholastic coach employed by a Board of
Education or other governing board may coach interscholastic squad members from the
school district where the coach is employed as coach without limitation from June 1 through July 31 if the 50% limitation is observed. The 50% limitation is defined as a maximum of 50% of the members of a team as defined in the playing rules of the sport. The following chart indicates those limitations for OHSAA recognized team sports.
50% Limitation on Sport Number of squad members
Baseball 4
Basketball 2
Field Hockey 5
Football 5
****** 5
Softball 4
Volleyball 3
Note: Ice Hockey shall use a five player limitation.
EXCEPTION 2: If the 50% limitation is observed, an interscholastic coach may continue
participation with a non-interscholastic squad in a national qualifying tournament after July 31 until the squad is eliminated from the national qualifying tournament but no later than Labor Day.