EAST RUTHERFORD, NJ - The Giants have placed safety Michael Johnson on injured reserve and promoted defensive back Brian Jackson from their practice squad to the active roster.

Johnson, a four-year veteran, is unable to play because of a herniated disc in his back. He played in the first two games of the season and recorded two tackles (one solo) on defense and a special teams tackle. Johnson was inactive last week vs. Tennessee.

A seventh-round draft choice in 2007 from Arizona, Johnson has played in 49 regular season games with 35 starts and five postseason games with a start. Last year, he started 14 of the 15 games in which he played. Johnson's career totals include 195 tackles (110 solo) and three interceptions. He also has 14 special teams tackles.

Jackson, 6-0 and 199 pounds, was signed to the practice squad on Sept. 9. He joined the NFL as a rookie free agent with the Jets on April 30 of this year. Jackson played in all four preseason games for the Jets and had four tackles, four passes defensed and a forced fumble, with three of the pass breakups and the forced fumble in the preseason finale at Philadelphia. Jackson was waived by the Jets on Sept. 7.

At the University of Oklahoma, Jackson played in 45 games with 26 starts and had 137 tackles, seven interceptions, 18 passes defensed, three forced fumbles and four fumble recoveries. As a senior, he started all 12 games and was named second team All-Big 12. Jackson led team with four interceptions and eight passes broken up. He became only the second player in OU
history to record interceptions in four straight games. Jackson scored his first career touchdown with a 52-yard fumble return vs. Texas A&M.

A native of Texas, Jackson was born on May 4, 1987.