Looking at that article, he's also suffering from back strain as well.
I found this quite interesting. Considering his woes in the wake of elbow surgery, the last thing he needs is to overuse his back.
In 2000, playing his 7th Test, Brett Lee suffered stress fractures in his back, aged 24. It ended a frightful run of fast bowling, 42 wickets averaging 16.
In 2001, 20 year old Bulls recruit, Mitchell Johnson underwent scans to reveal a stress fracture in his back and subsequently was plagued for 3 years by the injury.
Early in 2003, scans revealed a number of stress fractures for 22 year old Shane Watson, on the eve of a World Cup debut. However this was a familiar trouble for Watson who had dealt with the injury a further three times in his teens.
Not long after in 2003, Ashley Noffke suffered a lumbar stress fracture, which recurred in the form of a 'hotspot' that saw him rested in 2005.
Pakistan's Umar Gul met with 3 stress fractures in 2004, as he was fast becoming a pace sensation. Still only 23, his struggles with injury have not helped his reputation among pundits.
Before Umar Gul, 23 year old firebrand Waqar Younis missed the 1992 World Cup with stress fractures, while Imran Khan before him had lumbar stress fractures at age 31. It doubtlessly took considerable shine off a career at its peak. He struggled for nearly two years to recover and it took an experimental treatment to bring him back into the game.
Shane Bond's injury history is probably worthy of its own library, but his mentor Richard Hadlee too suffered from that ailment, leading him to study the mechanics of bowling and how to tune the bowling action to avoid injury, which then led into a career beyond his playing years.
Perhaps the most famous of all was Dennis Lillee's back injury in 72/73, the 23 year old tearaway at first not realising the severity of the injury, before finally being forced out of cricket and diagnosed with a stress fracture. He waited more than 21 months between his 11th and 12th Tests and many felt his career had been ended.
The bottom line; look after your back. For every professional cricketer who comes back from an injury, there are ten couldabeens who quit sport because of the risk.