The bullpen is a major need for both teams: Philadelphia's relievers combined to post an MLB-worst 7.06 ERA last season while San Francisco's bullpen was worth minus-0.6 WAR, according to FanGraphs.
Hendriks finished ninth in American League Cy Young voting following a dominant career-year with the Oakland Athletics. The 31-year-old recorded a 1.78 ERA, 1.14 FIP, and 0.67 WHIP with 14 saves in 15 chances.
Hand led the majors with 16 saves alongside a 2.05 ERA and 1.37 FIP for the Cleveland Indians, who surprisingly declined his $10-million option for 2021 at the end of October.
The Giants also appear to be interested in Archie Bradley, who split his 2020 season between the Arizona Diamondbacks and Cincinnati Reds. The Reds recently non-tendered the 28-year-old after one of the best seasons of his career.