The Defensive Line can be set up in more than one way but the positions somewhat remain the same.
Defensive End/Defensive Tackle/Nose Guard
The only difference is would be the way they line up.
Nose tackle/nose guard defensive tackle & defensive end. Nose tackle or nose guard same position it when lineman gets in stance in front of center or slightly off center. Defensive tackle usually lines up anywhere between centers outside shoulder & offensive tackles inside shoulder & defensive ends usually line up on either offensive tackles or tight ends outside shoulder.
In American football, the defensive tackles are the two interior lineman on the defensive line.
On running plays (by the opposing offence), there job is to push into the backfield, and either disrupt the running back's running lane, or (if they can) make a tackle in the backfield. On passing plays they try to push up the middle and either put pressure on the quarterback (although most quarterback sacks tend to come from the defensive ends, or the linebackers) or get their hands up to try and deflect passes.
If there is only one interior lineman on the defensive line, he is usually called a "nose tackle" rather than a defensive tackle.
Wikipedia has a good article on the position (including diagrams): http://en.wikipedia.org/wiki/Defensive_Tackle
A D-Lineman tries to go through the O-Line to sack, pressure into throwing a bad pass, or fumbling the quarterback or stopping a runningback from breaking a big play
This is how it goes:
OT OG C OG OT
OT: Offensive tackle
OG: Offensive guard
Offensive tackle and Defensive tackle.
The heaviest players on an NFL team almost all play on the offensive and defensive lines. For most teams it is a defensive tackle.
Chester McGlockton has: Played Himself - Oakland Raiders Defensive Tackle in "The NFL on NBC" in 1965. Played Himself - Los Angeles Raiders Defensive Tackle in "NFL Monday Night Football" in 1970. Played Himself - Denver Broncos Defensive Tackle in "NFL Monday Night Football" in 1970. Played Himself - Kansas City Chiefs Defensive Tackle in "NFL Monday Night Football" in 1970. Played Himself - Oakland Raiders Defensive Tackle in "NFL Monday Night Football" in 1970.
Defensive Tackle, maybe Defensive End.
On offence- Center, Guard, Tackle, Tight end, Quarterback, Running Back, and Wide Receiver. On defense- Linebacker, Guard, Tackle, Defensive End, Inside Linebacker, Outside Linebacker, Cornerback, Strong Safety, Free Safety
Rock was a defensive tackle.
tackle. LT is left tackle and RT is right tackle
Tackle the ball carrier.