The Texans' offensive line played poorly in the game, giving up a total of 10 sacks. Tom Savage started at quarterback for Houston and was sacked 6 times for a total loss of 33 yards. Savage was benched at halftime, finishing the game 7/13 with 62 yards and fumbled twice. Rookie quarterback Deshaun Watson entered the game in the second half and ended the first drive on a 4-yard touchdown pass to DeAndre Hopkins. Watson didn't fare much better behind the poor offensive line play, being sacked 4 times for a total loss of 21 yards with one fumble. Watson finished the game 12/23 for 102 yards with one touchdown and an interception along with 2 rushes for 16 yards. Linebacker Brian Cushing was suspended 10 games without pay following the game for violating the NFL's PED policy.
Question: How many sacks did the Texans offensive line give up in the second half?
Answer: 4