After being traded from Cubs, Anthony Rizzo and Javier Baez all homered in their first games with the new teams. (1:32).Kris Bryant joined his former Chicago Cubs teammates Anthony Rizzo, Javier Baez and made an immediate impression with their new team on Sunday.Bryant, now with the San Francisco Giants hit a solo home run for two in the third inning to win a 5-3 victory over the Houston Astros at Oracle Park. Two days prior, Rizzo hit a solo shot from 449 feet in his debut with the New York Yankees. Baez, however, hit a two-run home run in his first game with New York Mets.According to Elias Sports Bureau research, the former Cubs were the first trio of ex-teammates to begin the season together and then homer with their respective debuts with new clubs later in that season.Bryant stated, "I can't express enough how happy I am about the first day." "I feel giddy. It was like Christmas morning.Bryant was acquired in a trade with Cubs for two minor-league prospects, just minutes before Friday's deadline. He was greeted with chants of "KB KB, KBB, KB" as he walked onto the field for pregame warm ups, and was given a standing ovation prior to his first at-bat.After striking out swinging, the four-time All-Star was cheered once again. After Bryant smashed a 0-1 pitch by Luis Garcia (7-6) into left-field stands, the cheers grew louder. This was Bryant's 19th home run of the season.Bryant stated, "The first homer is weird." "You don’t know what teams do when they come to celebrate in a dugout so I was kinda lost.According to the Giants, Bryant would hit a homerun after what his former teammates did.Darin Ruf, first baseman, joked that "we were going to send his back if he didn’t homer himself," who in the fifth homered. "Fortunately, we get to keep him. "He's going be very, very useful to our team going ahead.Bryant started at third base, so it wasn't an ideal debut. The Astros were able to score a run in the fifth inning when Bryant's throwing error on Martin Maldonado’s grounder downfield gave them a runner with no outs. Logan Webb, however, retired the three remaining batters to get out of this jam.Bryant, however, made it clear that he is valuable to the Giants in their quest to keep ahead of the Los Angeles Dodgers (NLW) and San Diego Padres (NLW).Bryant is a bat that truly lengthens our team and makes our bench stronger, Gabe Kapler, Giants manager, said. It makes it harder to make it through the top of our lineup. He's going be great for us.This report was contributed by The Associated Press.