Promising St Kilda young gun Nathan Freeman has torn his hamstring again, continuing a horror run of injuries for the former number 10 draft pick. 

Freeman, who is yet to play a senior game of AFL, suffered the injury on Friday and could yet require surgery on his hamstring, according to St Kilda football manager Simon Lethlean, who confirmed the news this morning. 

"Nathan has done a huge amount of work with our medicos and conditioning team over the summer to reach the level needed to play AFL football," Lethlean said.

"Friday's injury, while relatively minor, suggests there could be an underlying issue with scar tissue that is preventing him from reaching his full capacity.

"Nathan will consult a specialist this week, but regardless of whether surgery is the preferred option, the recovery period is expected to be the same as a conventional rehab program.

"It's hoped he will only miss a few weeks of work on the track, where after he can then find a level of continuity with training and playing games that creates a platform to push for AFL selection."

The former Magpie had been firming to make his debut in round one against Brisbane however this latest setback will interrupt his preseason at the very least. 

Freeman's wretched injury history continues as he enters the final year of a three-year contract with the Saints.