OWINGS MILLS, Md. — Despite the notion that Haloti Ngata’s thigh injury is not considered serious, the Pro Bowl defensive tackle was missing from practice for the second straight day on Thursday.Ngata was nicked up during the Ravens’ 30-27 win over the Arizona Cardinals despite the team reporting no new injuries following the game. While concern has grown with the hulking defensive lineman missing from practice again, Ngata is still expected to play against the Pittsburgh Steelers on Sunday.Left guard Ben Grubbs practiced for the second straight day after he was listed as a limited participant on Wednesday. The fifth-year lineman appeared to be more active than he was the day before as he fired out from a three-point stance with the rest of the starting offensive line during positional drills.Return specialist David Reed (knee) returned to practice after not participating on Sunday, but wide receiver Lee Evans (ankle) and linebacker Dannell Ellerbe (thigh) were not present during the portion of practice. Evans is expected to miss his sixth straight game as he deals with “stress” in his left ankle.