Fernando Tatis Jr. slides into 3rd base, and is called out while he struggles to hold his left arm in pain. (1:09).SAN DIEGO -- Shortstop Fernando Tatis Jr. was partially dislocated in his left shoulder during Friday's 9-4 loss to Colorado Rockies.Tatis, 22 years old, was injured in his left shoulder and had to leave the game for the third time. In the All-Star Game, he was the NL's shortstop.Jayce Tingler, Padres manager, stated that Tatis' injury was similar to his previous two and that they will learn more on Saturday."I don’t know how I can compare them. Tingler stated that they were all quite different. "We are aware that this was possible, with the shoulder coming out and then returning in. It slid back in, which is a good thing.It's hard to predict the future, especially when there isn't much information. He has shown a remarkable ability to get back in there sooner than we expected, regardless of the reason. It's difficult to know without a lot more information.Tatis singled in a first inning. He advanced on Manny Machado’s sharp grounder to Ryan McMahon at third base. McMahon came up with the ball, but it then popped out of his glove and rolled behind him into short left field. Tatis ran for third and shortstop Brendan Rodgers ran towards third. He took McMahon's throw and tagged out Tatis sliding.Tatis fell awkwardly on the bag, and then collapsed in pain just a few feet away. This brought a hush to Petco Park. Tatis was unable to move and was assisted by Tingler and a trainer. Tatis' left arm was still in pain. Tatis was being held by the trainer's upper arm/shoulder.It was painful. It looked painful. "I'm sure that the Padres are crossing there fingers that this won't be a long-term thing," Rockies manager Bud Black stated. It's a blow for baseball. He is one the most talented players in the game.Tatis was partially dislocated his left shoulder in a violent swing against San Francisco on April 5. He was placed on the injured roster. Tatis was able to rehabilitate the shoulder and was able to leave a Cincinnati game on June 19 despite only missing one. Tatis was injured while throwing a throw and he left a spring training match. He returned two days later.Tatis missed eight games in May after being positive for COVID-19.Tatis was a.290 hitter with a NL-best 31 home runs and 23 stolen bases. He also had 78 runs scored, a.650 slugging rate, and a batting average of.290. His 70 RBIs rank third in the NL.Tatis is well-known for his spectacular shortstop plays, but he leads the majors in errors with 20. Tatis was the Padres' first player to be voted into starting an All-Star Game, since Tony Gwynn 1999.This report was contributed by The Associated Press.