Federal Aviation Administration regulations, after all, prohibit use of most cellular phones while flying.
Byrnes landed in San Diego earlier this week after watching the Padres' prospects playing for Double-A San Antonio. Since then, he's been busy fielding a steady stream of calls from general managers.
"For the last several weeks, we've been pretty busy spending time on it," Byrnes said late Thursday. "But at the same time, we're focused on the four or five conversations with clubs that makes the most sense for us."
The interest in third baseman Chase Headley remains substantial leading up to Tuesday's non-waiver Trade Deadline. The Padres will only give him away for a package that would include prospects, controllable Major League players or possibly a mix of both.
Headley, a durable switch-hitter, takes a .267 average, .787 OPS, 12 home runs and 51 RBIs into Friday's away game against the Marlins. Headley's .359 on-base percentage ranks fourth-best among Major League third basemen. The fact that he's under team control for two more seasons makes him very appealing.
The Padres don't have to move Headley. There are many within the organization who would just as soon hang onto him, even if third-base prospect Jedd Gyorko has been busy devouring Triple-A pitching in the Minor Leagues. Gyorko has a .341/.389/.597 slash line, with a .986 OPS.
Byrnes and his staff will sit down at Petco Park -- with professional scouts on a conference call -- to, as he said, "start comparing notes."
Last Sunday, the Padres signed outfielder Carlos Quentin to a three-year deal for $27 million, taking him off the market. The team could do the same with reliever Huston Street. There's been interest in relief pitcher Luke Gregerson, but most of the interest is in Headley.
But just because Byrnes' phone has been ringing incessantly, that doesn't mean he's obliged to make a deal.
"We're focused on some things that will make sense," Byrnes said. "I don't think we'll be quite as busy as everyone thinks."