In an airport, waiting to board a flight back to Sacramento, the last thing the Giants’ No. 1 prospect Bryce Eldridge was anticipating was the call.The 6-foot-7 slugger had only one thing in mind: getting through the airport’s security line. “[My phone] was literally in my bin, next to my bag, belt and whatever else was in there. It was faced up, and my buddy, Thomas Gavello, was standing there and saw it,” Eldridge told reporters Monday before his MLB debut against the Diamondbacks in Arizona.What Eldridge didn’t know was that Sacramento River Cats manager David Brundage was about to deliver the highly touted 20-year-old the call. “[Gavello] was like, ‘You should probably take that.’ I was like, ‘Oh, yeah.’ I’m just standing in the middle of security, and it’s like, I’m going to The Show. It was pretty cool,” Eldridge added. During the call, Eldridge was notified he was being promoted to the MLB ahead of San Francisco’s pivotal three-game series at Chase Field.After the news hit, the journey to Arizona began.“I got out in the middle of the...