BRETT Ebert, Robbie Gray and Dom Cassisi will hit Alberton Oval for Port Adelaide's SANFL side on Thursday evening.

Supporters will be able to see the three fan favourites in the club's traditional prison bar guernsey when the Magpies' league and reserves sides host Glenelg on Thursday 21 March.

Please note the league and reserves games have been swapped. The reserves will now play first at 5:45pm ahead of the league at approximately 7:15pm.

Entry to Alberton Oval will be free with both the Williams Family and Robert B. Quinn stands will be open for the public.

Port Adelaide and Glenelg will play three-thirds games in both the league and reserves.

Gray and Cassisi line up with the reserves at 5:45pm before Brett Ebert runs out with the league side from 7:15pm.

Gray and Cassisi are normally aligned to West in the SANFL, however have been given clearance to play for the Magpies reserves due to the Bloods not playing the week.

The double-header is a fantastic opportunity for supporters to get back to the club and cheer on the Magpies, while also seeing some of the club's best AFL-listed players in action at the same time.

General manager (SANFL) Brian Leys said it was an excellent result for Gray and Cassisi to play in the Magpies reserves and help them in their rehabilitation.

"It's great to have our AFL players playing here with the Magpies at Alberton as part of their return from injury," he told portadelaidefc.com.au

"We look forward to having all Port Adelaide supporters down here to support our boys in the last trial game before our SANFL season opener against Norwood next Thursday night."