Leinster are up to fourth in the Guinness Pro 12 table.
They beat the Ospreys in a tight game this evening at the RDS.
Ian Madigan kicked three first half penalties, while Jimmy Gopperth added three further penalties in the second half, as by the Blues won by 18 points to 12.
All of the Ospreys’ scores came from the boot of Sam Davies.
Leinster are now just four points off Munster at the top of the table, ahead of a 3-week break in the Pro 12 season.
Matt O’Connor’s men now face a Champions Cup double header against Harlequins over the next fortnight.
