The Red Sox added one player -- at least temporarily -- and lost two through the first seven picks of the Rule 5 draft Thursday morning.
With the seventh selection, the Red Sox chose Nationals second baseman Jeff Kobernus. According to WEEI.com's Alex Speier, Kobernus will be dealt to the Tigers for minor league infielder/outfielder Justin Henry.
A second-round pick in 2009 out of Cal, the 24-year-old Kobernus hit .282 with a .658 OPS in 82 games at Double A Harrisburg last season. He stole 42 bases in 53 attempts.
With the No. 1 overall selection, the Houston Astros selected relief pitcher Josh Fields, who despite an excellent 2012 season between Portland and Pawtucket was left off the Red Sox' 40-man roster and thus was left unprotected for Thursday's draft.
Three picks later, the Twins selected righthander Ryan Pressly.
Fields, a hard-throwing 27-year-old righthander, had a 2.01 ERA in 42 appearances between Double A and Triple A last season, with 78 strikeouts in 58 innings. He did not allow a run in 10 appearances at Pawtucket.
A former first-round pick of the Mariners in the 2008 draft, he was acquired by the Red Sox in 2011 in the Erik Bedard deal.
Pressly, 23, had a 2.93 ERA at Portland in 14 appearances last season, but struggled at Single A Salem (6.28 ERA in 20 appearances, including 12 starts). He throws in the upper-90s and progressed after converting to the bullpen.
Players selected in the Rule 5 draft must remain on the drafting team's 25-man roster all season or else be offered back to their previous team.
In the Triple A portion of the draft, the Red Sox selected Jack McGeary, a 23-year-old lefthander out of the Nationals organization who starred at Roxbury Latin. Here is a profile the Globe's John Powers wrote on him in 2009.