Duckworth, 38, was hired by the Yankees after concluding a 16-year playing career (1998-2013). Signed by the Phillies as a non-drafted free agent in 1997, he was 23-34 with one save and a 5.28 ERA (511.0IP, 300ER, 376K) in 134 games (84 starts) spanning eight Major League seasons with Philadelphia (2001-03), Houston (2004-05) and Kansas City (2006-08). Duckworth also pitched for Nippon Professional Baseball's Tohoku Rakuten Golden Eagles from 2012-13, going 8-6 with a 3.99 ERA (124.0IP, 55ER, 86K) in 24 games (23 starts) and helping the club win the 2013 Japan Series title.
Espada, 38, joins the Yankees after spending the past eight years (2006-13) as a coach and coordinator in the Marlins organization. After serving as a hitting coach for Single-A Greensboro (2006) and Single-A Jupiter (2007), he spent two seasons as the organization's minor league infield coordinator (2008-09) and four seasons as the Major League club's third base coach (2010-13). Selected by the Oakland A's in the second round of the 1996 First-Year Player Draft, Espada played in 779 games during a 10-year professional career (1996-2005), including 214 games at the Triple-A level. He played baseball for three seasons (1994-96) at the University of Mobile (Ala.) and still holds the two highest single-season batting averages in school history (.468 in 1995 and .446 in 1996), as well as the highest career batting average (.442).
Giese, 36, played 12 professional seasons (1999-2010) after being selected by the Boston Red Sox in the 34th round of the 1999 First-Year Player Draft. After a three-year career at the University of San Diego (1996-98), he went 48-28 with a 2.86 ERA (672.1IP, 214ER, 606K) in 396 minor league appearances (10 starts). Giese also made 35 Major League appearances (four starts) with San Francisco (2007), New York-AL (2008) and Oakland (2009), going 1-8 with a 4.22 ERA (74.2IP, 35ER, 47K). In 2008 with the Yankees, he was 1-3 with a 3.53 ERA (43.1IP, 17ER, 29K) in 17 relief appearances and three starts.
Twombley, 38, has spent the previous six seasons (2008-13) as an amateur scout in the Yankees organization. Selected by the Yankees in the 40th round of the 1996 First-Year Player Draft, he played in 167 games as a catcher with Tampa, Greensboro and Oneonta from 1996-99, also playing with the Greenville Bluesmen of the independent Texas-Louisiana League in 2001. Prior to joining the Yankees' amateur scouting department, Twombley spent five seasons (2003-07) as an amateur scout with the Houston Astros.