Buster Posey added two former teammates to the Giants front office this week, hiring catcher Santiago Casali and infielder José López into newly created roles that blend scouting with player development. Both men played alongside Posey during San Francisco's 2021 playoff run. Neither hire appeared in the club's official press materials; both names surfaced in roster update footnotes.
Casali, 33, caught Posey's final season and spent parts of six years in the majors with Tampa Bay, Cincinnati, and San Francisco. López, 35, played 12 seasons as a middle infielder and utilityman, last appearing in affiliated ball with the Giants' Triple-A affiliate in 2022. The exact titles remain undefined—front office sources describe the roles as hybrid positions reporting directly to Posey's office, focused on bridging communication between big-league staff and the farm system. One person familiar with the structure said the moves formalize what both men were already doing informally: sitting in on development meetings, texting Posey scouting notes, traveling to Sacramento for private catching instruction.
The hires reveal Posey's preferred operating model six months into his presidency. He has added four former teammates to various advisory capacities since taking over in September 2024, including pitching coach Matt Cain and special assistant Pablo Sandoval. The pattern is deliberate. Posey trusts people who understand his communication shorthand—the difference between a two-seam that "backs up" versus one that "cuts back." He also prefers operators who lived the San Francisco development system as players and can translate big-league feedback into actionable minor-league curriculum. Casali caught Logan Webb's breakout season. López worked daily with infield coordinator Mike Beesley, who remains on staff and now has a direct reporting line through López's new role.
This matters for two reasons. First, it signals Posey intends to compress the decision chain between his office and the player development staff. Most clubs separate scouting, development, and big-league operations into distinct silos with formal hierarchies. Posey is building a flatter structure where trusted former players carry authority across all three domains without waiting for monthly alignment meetings. Second, it accelerates the timeline for implementing whatever philosophical changes Posey wants in the farm system. He has been public about emphasizing strike-zone discipline and two-strike hitting—an adjustment that requires buy-in from 18 minor-league coaches across five affiliates. Casali and López give him two evangelist operators who can travel the system, sit in cages, and correct swing decisions in real time without needing a vice president's approval.
The structure also positions Posey to move faster on midseason call-ups. Last July, the Giants promoted outfielder Luis Matos after he posted a .312 average in Triple-A but struggled immediately with big-league breaking balls. Development staff blamed insufficient advanced scouting prep; big-league staff said Matos was told the plan. The breakdown was procedural—no one owned the transition handoff. Casali's role explicitly includes pre-promotion preparation: flying to Sacramento, catching the player's bullpen sessions, briefing him on big-league sequencing tendencies, then traveling with him to San Francisco for the first week. It's a $400,000-per-year insurance policy against promotion failures.
The Giants face two immediate tests for this structure. Pitching prospects Kyle Harrison and Mason Black will likely need midseason adjustments after full rookie seasons. Position players Marco Luciano and Vaun Brown are both knocking on the big-league door with incomplete defensive profiles. Whether Casali and López can compress the development-to-execution gap will show up in second-half call-up performance.
Posey also now employs six former catchers across his front office and coaching staff, the highest concentration in baseball. The position bias is not accidental. Catchers process information laterally—they see the plate umpire's zone, the base runner's secondary lead, the dugout's defensive shift card, and the pitcher's fatigue tells simultaneously. Posey is betting that skill set translates to front-office synthesis work. Whether the bet holds depends on how much authority he's willing to delegate and how quickly his former teammates learn to operate outside their comfort domain.
Casali and López start immediately. Both will travel with the big-league club during the season's first two weeks before splitting off to minor-league affiliates. Spring training decisions—specifically, which fringe roster candidates make the Opening Day 26-man—will be their first test.
The takeaway
Posey builds a compressed command chain using former teammates, betting catcher instincts translate to cross-silo synthesis.
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