LAKE BUENA VISTA, Fla. -- In a testimony to their pitching depth, the Giants lost Minor League left-hander Joe Paterson to the Arizona Diamondbacks in Thursday's Rule 5 Draft, which marked the conclusion of baseball's Winter Meetings.

Paterson, 24, made 46 of his 53 appearances this year for Triple-A Fresno -- the others were with high Class A San Jose -- and went 5-3 with a 3.03 ERA. A 10th-round selection in the 2007 First-Year Player Draft, Paterson struck out 64 and walked 26 while yielding only two home runs in 65 1/3 innings.

He followed that performance by recording a 2.25 ERA in 10 Arizona Fall League appearances for Scottsdale (nine) and Peoria (one).

The Giants had feared that they would lose at least one pitcher in the Rule 5 Draft, but they simply couldn't hoard everybody they wanted to protect on the 40-man roster.

"He's a big league pitcher," said Dick Tidrow, the Giants' vice president of player personnel, who envisioned Paterson as a lefty-on-lefty specialist. "He's going to make their team."

Under terms of the Draft, if Paterson doesn't make Arizona's Opening Day roster, he must be offered back to the Giants for half of the $50,000 purchase price if he clears waivers.

Demonstrating that the baseball world can be a small one, the Yankees plucked right-hander Daniel Turpen from Boston's organization later in the Draft's big league portion. Turpen and Paterson were teammates in high school (McMinnville, Ore.) and college (Oregon State, where they won the 2006 College World Series). The Giants traded Turpen to Boston on July 31 to obtain right-hander Ramon Ramirez, who furthered San Francisco's successful World Series bid by recording a 0.67 ERA in 25 relief outings.

The Giants loaded up in the Draft's Triple-A phase, selecting three players: left-hander Justin Dowdy (2.04 ERA in 11 games with Tampa Bay's Montgomery affiliate; 0.73 ERA in his first 16 outings with Culiacan in the Mexican Pacific League); catcher Dashenko Ricardo (.187 in 32 games with two Baltimore affiliates); and right-hander Matthew Sartor (4-9, 4.30 with 71 strikeouts in 58 2/3 innings for two Dodgers outposts).

San Francisco also lost third baseman Jacob Blackwood to San Diego in the Draft's Triple-A portion.