The April Arbitron radio ratings released Wednesday show marked improvements for WGN-AM 720’s morning and afternoon drive timeslots compared to both last month and one year ago.

Morning drive host Greg Jarrett ranked first with a 10.0 share among overall listeners 12+ Mon-Fri 5-9am, up from an 8.3 share in March 2010 and an 8.0 share in April 2009. In the 35-64 demo, Jarrett ranked second with a 7.3 share in April 2010, up from 5.1 in March 2010 and 6.3 in April 2009.

Garry Meier, who moved into afternoon drive on April 9^th, has already shown growth in his new timeslot without the influence of Cubs baseball. On days when the Cubs games weren’t broadcast 3-6pm, Garry ranked second 12+ with a 5.0 share, up from a sixth-ranked 4.1 in March 2010.

Among overall listeners 12+ Mon-Sun 6a-12a, WGN is ranked first with a 6.5 share in April 2010.