Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Player | Position | League | Team | Years |
| --- | --- | --- | --- | --- |
| 1940s | 1940s | 1940s | 1940s | 1940s |
| Elmore Harris | RB | AAFC | Brooklyn Dodgers | 1947 |
| 1950s | 1950s | 1950s | 1950s | 1950s |
| Len Ford † | DE | NFL | Cleveland Browns | 1950 |
| Charlie Robinson | G | NFL | Pittsburgh Steelers | 1951 |
| Rosey Brown | OT | NFL | New York Giants | 1952 |
| 1960s | 1960s | 1960s | 1960s | 1960s |
| Oliver Dobbins | DB | NFL | Buffalo Bills | 1964 |
| Leroy Kelly † | RB | NFL | Cleveland Browns | 1964 |
| Willie Lanier | LB | NFL | Kansas City Chiefs | 1966 |
| Tom Carr | DT | NFL | New Orleans Saints | 1967 |
| Carlton Dabney | DT | NFL | Atlanta Falcons | 1968 |
| Daryl Johnson | CB | NFL | Boston Patriots | 1968 |
| Alvin Mitchell | CB | NFL | Cleveland Browns | 1968 |
| Jeff Queen | LB | NFL | San Diego Chargers | 1969 |
| Clarence Scott | CB | NFL | Boston Patriots | 1968 |
| Bob Wade | CB | NFL | Pittsburgh Steelers | 1969 |
| George Nock | RB | NFL | New York Jets | 1969 |
| John "Frenchy" Fuqua | RB | NFL | Pittsburgh Steelers | 1969 |
| 1970s | 1970s | 1970s | 1970s | 1970s |
| Raymond Chester | TE | NFL | Oakland Raiders | 1970 |
| Ed Hayes | S | NFL | Philadelphia Eagles | 1970 |
| Mark Washington | CB | NFL | Dallas Cowboys | 1970 |
| Willie Germany | S | NFL | Atlanta Falcons | 1972 |
| Ara "Sonny" Person | TE | NFL | St. Louis Cardinals | 1971 |
| John Sykes | RB | NFL | San Diego Chargers | 1972 |
| John "Tiny" Andrews | DE | NFL | Miami Dolphins | 1972 |
| Maurice Tyler | CB | NFL | Buffalo Bills | 1972 |
| Ron Mayo | TE | NFL | Houston Oilers | 1973 |
| Stan Cherry | LB | NFL | Baltimore Colts | 1973 |
| Greg Latta | TE | NFL | Chicago Bears | 1975 |
| Mike Collier | RB | NFL | Pittsburgh Steelers | 1975 |
| Bobby Hammond | RB | NFL | New York Giants | 1976 |
| Tim Baylor | S | NFL | Baltimore Colts | 1976 |
| 1980s | 1980s | 1980s | 1980s | 1980s |
| Elvis Franks | DE | NFL | Cleveland Browns | 1980 |
| Mike Holston | WR | NFL | Houston Oilers | 1981 |
| Cornell Gowdy | CB | NFL | Dallas Cowboys | 1986 |
| 1990s | 1990s | 1990s | 1990s | 1990s |
| Kelvin Moore | S | NFL | Cincinnati Bengals | 1998 |
| 2000s | 2000s | 2000s | 2000s | 2000s |
| Willie Jones | DT | NFL | Kansas City Chiefs | 2001 |
| Visanthe Shiancoe | TE | NFL | Minnesota Vikings | 2003 |
| Cliff Johnson | DB | NFL | Detroit Lions | 2005 |
| Cliff Louis | OT | NFL | Cleveland Browns | 2007 |
| Chad Simpson | RB | NFL | Indianapolis Colts | 2007 |
| † Member of the NFL Hall of Fame | † Member of the NFL Hall of Fame | † Member of the NFL Hall of Fame | † Member of the NFL Hall of Fame | † Member of the NFL Hall of Fame |
Question:
What years did Alvin Mitchell play?
Answer:
1968.0