RICHMOND tall Ben Griffiths could return to football as soon as this Saturday, with the key forward passing all necessary concussion tests after a two-and-a-half month lay-off.

Griffiths is set to train with the Tigers' VFL team this week with a view to lining up against Werribee on Saturday, pending final fitness tests.

The 25-year-old has been unavailable for selection since round six after suffering his second head knock for the season, prompting a series of scans and tests.

Griffiths has been wearing a helmet since early last season after suffering repeated problems and the Tigers took an extremely cautious approach with his recovery from the latest setback.

"Ben has been training well and we hope to see him play this weekend," football manager Neil Balme said on the club's website. 

"He needs to get through this week, but the signs are looking very promising at this stage.

"We have taken a conservative approach with Ben, given his history with concussion, and his welfare has always been paramount.

"The club’s medical staff have done a great job managing him."

Meanwhile, defender Dylan Grimes also faces a fitness test after suffering concussion in Saturday's clash against St Kilda.

Grimes was ruled out for the entire second half against the Saints after being struck high by Tim Membrey in a collision that cost the Saints forward a two-match suspension.    

Ben Lennon, who has been sidelined for three matches, is also closing in on a return from a hamstring injury and faces a fitness test this week.