The Indianapolis Colts have undergone some major changes this offseason. Despite their newfound sense of optimism, there is no denying that the team's future success hinges on the lingering health of quarterback Andrew Luck.

Fortunately, Luck is reportedly making much better progress on the injured shoulder than he was at this point last year. According to Stephen Holder of the IndyStar, his attempts to play while injured ultimately messed with his throwing mechanics:

Conversations with sources, coupled with some vague admissions by Luck on Monday, have provided some clarity about what, exactly, has been the holdup. If you want to know why there’s been such an emphasis on Luck’s throwing mechanics, as he and the team have said, it’s because his mechanics went sideways while he played hurt. That put unnecessary stress on his shoulder and made a bad situation worse.

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Luck had played through a number of injuries over the past several seasons. It seems during that time he had started developing bad habits in his throwing motion in order to compensate for his other physical shortcomings.

However, his health took a turn for the worst after undergoing shoulder surgery following the 2016 campaign. What transpired afterward was a series of empty promises from team owner Jim Irsay regarding Luck's return. That said, it seems they are now taking a much more cautious approach this time around.

Although he still has yet to throw regulation-sized footballs, Luck is much more optimistic about being back under center in time for training camp.