Eighteen-year-old Bryan Klein pleaded guilty last month to conspiracy to commit aggravated arson and was sentenced Wednesday. The Jan. 11 blaze destroyed Loyle Lanes.
Klein was 17 at the time of the fire. Officials say he has helped investigators with the case.
Authorities say the teen from Philadelphia and 21-year-old Felix Manzano were hired to start the fire. They say the man behind it was Steven Smink, the manager of a rival bowling alley in nearby Deerfield.
Manzano and Smink have pleaded not guilty and are awaiting trial.
