Tiger Woods may not feature at this year's US Open after registering for the event this week, says his agent.

Mark Steinberg told ESPN that cases like this care "simply procedural" and that this move does not necessarily mean that the 14-time major winner will be making a comeback to the sport.

"No reason to read anything into this,” Steinberg was quoted as saying.

Tiger Woods has struggled with back injuries for the past 18 months and has failed to find any sort of rhythm after some sporadic play after tournaments in 2015.

“I’ve been hitting balls and training daily, but I’m not physically ready,” Woods said in a statement.

“I’ve said all along that this time I need to be cautious and do what’s best for my long-term health and career… I’m absolutely making progress, and I’m really happy with how far I’ve come, but I still have no timetable to return to competitive golf.”

Possible returns include the Wells Fargo Championship, which begins next week in Charlotte or The Players Championship at TPC Sawgrass in May.