Overview

• The Giants selected Whisenhunt’s contract on July 28, adding their top pitching prospect to both the active and 40-man rosters for Monday night’s start at Oracle Park
• Right-hander Sean Hjelle was optioned to Triple-A Sacramento and Carson Ragsdale was designated for assignment to clear roster spots
• Whisenhunt fills the void left by Hayden Birdsong’s demotion and Landen Roupp’s placement on the 15-day injured list with right elbow inflammation
• The 24-year-old left-hander led the Pacific Coast League with a 4.42 ERA over 18 Triple-A starts, earned two PCL Pitcher of the Week honors and twice pitched in the All-Star Futures Game
• San Francisco’s 54-52 record trails the Padres by three games for the final NL wild-card spot, heightening urgency to strengthen the rotation before the July 31 trade deadline