Instead of his regular season ending in early September like in the Minor Leagues, his first big league season went until the end of the month.
And, oh yeah, there was the National League Division Series against the Brewers that also kept him busy.
So in the end, he had to pass on the internship.
"It was just a connection I had," Goldschmidt said. "I was just going to be shadowing a financial investor, doing whatever paperwork needed to be done, making copies and things like that."
If he's as fast a learner in the boardroom as he was on the baseball field, some company would be wise to snap him up.
Goldschmidt was drafted by the D-backs in the eighth round of the 2009 First-Year Player Draft and in 2010 he hit .314 with 35 homers and 108 RBIs for Class A Visalia.
That earned him an invitation to big league camp last year where he hit .417 with a pair of mammoth homers. While he didn't make the team, his performance put him on the radar and when he followed it up by hitting 30 homers in his first 366 Double-A at-bats, the D-backs summoned him to the big leagues.
That's when Goldschmidt realized that his internship for the fall was not going to happen.
Still, Goldschmidt is intrigued by the financial world.
"I enjoy numbers in the business sense," he said. "It's like in baseball, there's some organizations that are really into sabermetrics and some are more old school and do the eye test. It's the same in business when it comes to investing in companies. There are companies with awful numbers, but someone likes them and they turn out to be great. Other people like to look at the numbers."
Goldschmidt spent a previous offseason serving an internship with a pharmaceutical company that sold its products to veterinarians.
Initially he was going to work in the company's internal financial division, but when it realized his time was limited to a few months during the offseason, it didn't make sense to spend the time training him.
"I ended up just working with the sales team putting numbers into the computer and doing mundane stuff," he said.
Goldschmidt would like to finish up his finance degree -- he's one year shy -- but has found it challenging to fit into his baseball schedule. He is considering doing some online classes to help the process along.
After hitting .250 with eight homers in 48 games for the D-backs last year, Goldschmidt knows that his biggest test on the baseball field is yet to come.
"Honestly it's a huge year for Goldy," D-backs manager Kirk Gibson said. "[Pitchers] know him, they're going to change some things, he's probably going to have to make some adjustments. He's worked very hard and we'll see what happens. We're certainly expecting him to be fine, but it's an important time for him, it's an important year for him."